In London, a van ploughed into a crowd near a mosque early on Monday, leaving one person dead and injuring 10 others in the second terror attack this month in the city.
Some locals came onto the street in support of the mosque on Monday, carrying signs saying "We love our mixed community" and "Leave our Muslim neighbours alone".
"Our community is in shock", he said, urging people attending prayers to remain vigilant.
After being seized, he said he had wanted to kill "many Muslim people", one witness told journalists.
The attack happened on Seven Sisters Road in Finsbury Park just after midnight.
Prime Minister Theresa May condemned the "sickening" incident, reaffirming Britain's determination to fight "terrorism, extremism and hatred".
One man died and 9 people were hospitalized following the assault, the latest in a series of terror attacks to hit the United Kingdom this year.
London Mayor Sadiq Khan said, "While this appears to be an attack on a particular community, like the awful attacks in Manchester, Westminster, and London Bridge, it is also an assault on all our shared values of tolerance, freedom, and respect".
Locals held onto the Singapore-born suspect until he was detained by police and later arrested on charges of "the commission, preparation or instigation of terrorism including murder and attempted murder". Met Police Commissioner Cressida Dick said there is now an ongoing investigation by the Counter Terrorism Command to establish why this attack was carried out.More news: Opposition's views taken into account in picking Ram Nath Kovind
But the imam from the mosque outside of which the attack took place came outside and persuaded the angry, grief-stricken crowd to practice peace, not violence.
Details about the assailant were sketchy, but the assault the most dramatic against Muslims in London in recent years suggested a new, risky level of polarization in British society.
The man said: 'I have been living in London now nearly eight years - it is a good place, a safe place, but after what happened it doesn't seem to be as we thought it was'.
"These were the kinds of comments people were yelling out", she said.
Iman Atta, director of Tell MAMA, said the group had distributed safety leaflets to mosques, calling for vigilance so that congregations stay safe.
"Reassurance they are free to practise their faith, they are free to walk about the streets, and people must be able to do that", he said.
This time the attacker deliberately targeted Muslims, according to the police.
- UK Home Secretary Amber Rudd said, "We must all continue to stand together, resolute, against all those who try to divide us and spread hate and fear".
The Muslim Council of Britain said Monday's attack was the most violent manifestation of Islamophobia in Britain in recent months and called for extra security at places of worship.
She added: "I saw a lot of people injured". In March, a man plowed a rented SUV into pedestrians on London's Westminster Bridge, killing four people before stabbing a police officer to death outside Parliament.