A van has reportedly driven into pedestrians in north London.
Authorities said "a number of casualties" were being treated at the scene outside the Muslim Welfare House near a mosque on the Seven Sisters Road in Finsbury Park.
Numerous victims are believed to have just finished worshipping at the Finsbury Park mosque after breaking the Ramadan fast.
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A 48-year old van driver, who was detained by members of public at the scene and then arrested by police, has been taken to hospital and will be subject to a mental health assessment.
Eyewitness told Sky News and other British media that the van seemed to have veered and hit people intentionally. "Shortly after police cordoned the area", said BBC producer Abdirahim Saeed, who was tweeting from the scene.
British Prime Minister Theresa May was informed of the incident about 3:00am local time.
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Britain's terrorist alert has been set at "severe" meaning an attack is highly likely. And after two van attacks since the month of March alone, London is wondering whether the Finsbury Park "incident" is another terrorist attack.
Eight people were killed and 50 injured on June 3 when three Islamist militants drove into pedestrians on London Bridge and stabbed people at nearby restaurants and bars.
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