The man, who is in custody at a south London police station, was arrested earlier on suspicion of attempted murder. Eight of the injured were taken to hospital and two were treated at the scene.
Khan said this afternoon that police resources in London are so stretched that officers on holiday are being called back to ensure there is an increased presence in the capital in response to the most recent terrorist incident.More news: HTC's U11 Now Comes in Solar Red
"Hatred and evil of this kind will never succeed", May said.
Searches are being carried out at a residential address, where Osborne is listed as living, in the Cardiff area.
But Kacimi said there was no need for the Muslim community to panic, because police and government officials have been "very, very supportive".
The European Jewish Congress in a statement called the attack " unconscionable".
"We found a group of people quickly started to collect around him, around the assailant and some tried to hit him, either kicks or punches", Imam Mahmoud told reporters this morning outside the mosque. "It is too early to state if his death was as a result of the attack". His attack killed five people. "When (the driver) was running, he was saying, 'I wanna kill more people, I wanna kill more Muslims, '" he told BBC TV.More news: Amateur baseball players react to hearing their names called in MLB draft
- Islington's Seven Sisters Road, where the attack took place, is home to at least four mosques, and would have likely been filled with worshipers leaving late-night taraweeh prayers. A man was inside in the van, I saw with my eye, and the old man was also on the ground, and I see some people were also injured. No other suspects have been identified, police said.
"One man was pronounced dead at the scene", the Metropolitan police said in a statement.
British Security Minister Ben Wallace said the man who drove the van into worshippers was not previously known to authorities for any links to extremism.
"Over the past weeks and months, Muslims have endured many incidents of Islamophobia and this is the most violent manifestation to date", said Harun Khan, head of the Muslim Council of Britain (MCB), an umbrella body.
On March 22, a man drove a rented auto into pedestrians on Westminster Bridge in London and stabbed a policeman to death before being shot dead.More news: OnePlus 5 all but officially revealed in India
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