Police say they rushed to the scene after the incident happened after midnight local time.
"We have been informed that a van has run over worshippers as they left #FinsburyPark Mosque". "Our prayers are with the victims".
Earlier this month, a van veered into pedestrians on London Bridge, with attackers then stabbing and slashing eight people to death and wounding many others on the bridge and in the nearby Borough Market area.
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The measures were announced following the second meeting of the Grenfell Tower Recovery Taskforce, chaired by the Prime Minister. Fifty-eight people are confirmed or presumed dead in the fire and authorities fear that death toll will rise.
Prime Minister Theresa May called it a "terrible incident", and said: "All my thoughts are with those who have been injured, their loved ones and the emergency services on the scene".
Police are investigating this as a terrorist incident, saying 10 people were injured and one person was killed.
The driver of the van, a 48-year-old man, was found at the scene and detained by the public until police arrested him.
"There are a number of casualties", at the scene on Seven Sisters Road, according to a statement from Metropolitan Police.
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THE TORIES HAVE been told that forming a government with the DUP could jeopardise the peace process in Northern Ireland . On Brexit, Ms Foster said her party wanted to see "a sensible Brexit and one that works for everybody".
London traffice said, "A503 Seven Sisters Rd is now closed N/B at Hornsey Rd & S/B at Rock St due to an emergency services incident".
Harun Khan, the head of the MCB, described the incident as the "most violent manifestation to date" of Islamophobia, and called on authorities to do more "to tackle the growth in hate crime".
The mosques were busy with people observing the holy month of Ramadan.
The Finsbury Park Mosque opened in 1994 and became a hotbed of Islamist militants, including Zacarias Moussaoui, a Frenchman convicted of conspiring to kill Americans as part of the September 11, 2001, attacks, and Richard Reid, who attempted to down a USA jetliner in late 2001 with explosives packed in his shoes. His attack killed five people. In March, a man drove a vehicle into pedestrians on Westminster Bridge and stabbed a police officer to death before being shot dead.
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Curry hopped and shouted as he gave high-fives to the crowd after getting off a double-decker bus during the Thursday parade. Golden State won the series in five games and Green displayed a shirt that said "Quickie" with the Quicken Loans symbol.
There was also an attack at an Ariana Grande concert in Manchester, where a bomber set off an explosion that killed more than 20 people.
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