A man in his 20s has died and three others are suffering from "life-threatening injuries" following reports of mass brawl in Essex.
Police have launched a murder investigation after officers found the man had been stabbed in the chest and died at the scene in Blackshots Lane, Grays.
Three men are being treated at Basildon Hospital for injuries believed to be life-threatening, police added.
Officers said the incident, at around 12.35am on Saturday, was believed to be linked with another in nearby Fleming Road, Chafford Hundred, where a 17-year-old was knocked unconscious at around 1.55am.
The Conservatives must "change hard" to win over young voters who backed Labour in June's general election, Theresa May's most senior minister is to warn.
Damian Green will tell Tories they must modernise after losing their majority in an election where they trailed Labour by 30% among voters aged 18-35.
The First Secretary of State will tell Conservatives to create a "distinctive" message for "excluded voters".
It comes amid signals the government could ease off on austerity.
Thousands of people are expected to gather a mile away from where Mr Green is due to speak later for an anti-austerity demonstration Mr Corbyn will address.
Speaking at the Bright Blue liberal conservative think-tank's conference, Mr Green will discuss a new "city Conservativism" to woo young, metropolitan voters.
Devolution of power
This will involve highlighting existing Tory policies to build 1.5 million homes by 2022 and the devolution of power to British cities.
"I am not standing here and saying all we need to do is keep calm and carry on," he will say.
"We need to think hard, work hard and change hard.
"We need to show how Conservative values and policies can work for those parts of the country, and parts of the population, who have turned away from us."
Mr Green, effectively Mrs May's deputy prime minister, will say that the "root" of the Conservatives' failure to win a majority last month lies in those aged 18 to 35.
He will say: "If we are to bring young, educated, working Britain back to the Conservative Party, we need to make a reality of the promise to build a country that works for everyone."
On housing, Mr Green will promise that the Conservatives will build "high-quality" homes, including social housing that creates "sustainable and integrated communities".
London's mayor has urged Theresa May to appoint commissioners to run Kensington and Chelsea council after its leader resigned over the Grenfell Tower fire.
Sadiq Khan welcomed Nicholas Paget-Brown's decision to stand down, but said public trust could not be restored by other members of the council.
He said residents "quite rightly feel desperately neglected".
Mr Paget-Brown resigned on Friday, saying he had to accept his "share of responsibility for perceived failings".
At least 80 people are believed to have died as fire engulfed the Grenfell Tower block, in west London, on 14 June.
The decision led to a rebuke from Downing Street, which said it would have expected the council to respect a High Court ruling that the meeting be open to the public.
Reacting to Mr Paget-Brown's resignation, Mr Khan said it had been "clear that the local community in and around North Kensington has lost trust in the council and that the administration is not fit for purpose".
He called on the prime minister to appoint "untainted" commissioners with "a genuine empathy for local people and the situation they face" to take over the running of the council until the next local council elections.
Mr Khan added: "The council now needs to find a way to move forward and find a way to restore the confidence in that community.
"That can only be done with new leadership and a new approach that reaches out to residents who quite rightly feel desperately neglected."
Yvette Williams, co-ordinator of the Justice4Grenfell campaign, told BBC Radio 4's Today programme that the community was "very, very angry" and would not accept commissioners without consultation.
"They need to speak to us, we are not going to consistently have people imposed on us," she said.
"I do support the mayor in terms of a commissioner-led borough, but how are those people going to be selected?"
She added that one former Grenfell Tower resident had had rent deducted from their bank account since the tragedy.
In response, Catherine Faulks, Conservative councillor for Kensington and Chelsea council, said "I'm very sorry to hear that happened, but that person, if it's happened, will have a one-person connection to go to, to explain that's happened, who will help them sort it out."
Residents condemned the response to the tragedy, calling it "absolute chaos" as relief efforts on the ground were limited.
They said there was little or no co-ordination in the immediate days after the disaster, with claims council officials were nowhere to be seen.
The council was accused of failing to provide enough support or information to those who had been made homeless.
It tried to hold the first cabinet meeting since the disaster behind closed doors.
After a High Court order ruled it should be open to the public, the council adjourned the meeting after 20 minutes, claiming an open meeting would "prejudice" the inquiry.
Ms Faulks said Mr Paget-Brown had done the "honourable thing" in resigning.
"I completely understand the anger, the frustration of the local community," she said.
"Of course we weren't immediately quick off the ground, it was an enormous tragedy, I don't know if everyone realised how complex and how vast this fire was.
"I challenge any borough in the whole country to immediately have had an action plan that they could put into place."
But shadow housing secretary John Healey told BBC Radio 4's Today programme that he backed Mr Khan's call because the council had "demonstrated they are not up to the job".
"The public and residents' trust can't be restored by simply replacing the leader and deputy leader by other politicians from the same political group and this is where ministers need to step in," he said.
The former head of the civil service, Lord Kerslake, a cross-bench peer, told Today commissioners were "not brought in lightly" and it had "only happened on very few occasions".
"The test for me about whether commissioners come in - I wouldn't like to make that judgement not being close to the detail - is really, essentially, can the council do the job that is necessary to make the building safe and in particular to support those who have been affected?" he said.
"The pace of response has been the issue and also I have to say the communication. The public have a right to know what's going on."
Council leaders claimed on Thursday that an open meeting would "prejudice" the forthcoming public inquiry into the disaster.
But angry protests followed and Labour councillor Robert Atkinson, whose ward includes Grenfell Tower, branded the abandoned meeting a "fiasco".
In his resignation statement, Mr Paget-Brown said he had received legal advice not to "compromise" the public inquiry into the fire by having the meeting open to the public and press.
But he added this decision "has itself become a political story".
"It cannot be right that this should have become the focus of attention when so many are dead or still unaccounted for," he said.Communities Secretary Sajid Javid said the resignation was a "personal matter" for Mr Paget-Brown, but added that it was "right that he has stepped aside".
Deputy council leader and cabinet member for housing, property and regeneration, Rock Feilding-Mellen, also stood down.
The fire at the 24-storey block in North Kensington destroyed 151 homes, both in the tower and surrounding areas.
Documents obtained by the BBC suggest cladding fitted to Grenfell Tower during its refurbishment was changed to a cheaper version, which was less fire resistant.
The tower's cladding has been the focus of attention, amid suggestions it was why the flames spread so quickly.
Meanwhile, the head of Kensington and Chelsea Tenant Management Organisation has stepped aside so he can focus on "assisting with the investigation and inquiry"
