The Muslim Council of Britain has called for extra security around mosques, describing yesterday's London van attack as "the most violent manifestation" of Islamophobia.
The council's secretary general Harun Khan said he expected authorities to step up security "as a matter of urgency", adding many would feel "terrorised" following the incident outside the Muslim Welfare House in Seven Sisters Rd, Finsbury Park .
"According to eyewitness accounts and videos taken after the incident, it appears that a white man in a van intentionally ploughed into a group of worshippers who were already tending to someone who had been taken ill," he said.
"During the night, ordinary British citizens were set upon while they were going about their lives, completing their night worship. It appears from eyewitness accounts that the perpetrator was motivated by Islamophobia.
"Over the past weeks and months, Muslims have endured many incidents of Islamophobia and this is the most violent manifestation to date.
"Given we are approaching the end of the month of Ramadan and the celebration of Eid with many Muslims going to local mosques, we expect the authorities to increase security outside mosques as a matter of urgency.
"Muslim communities have been calling for increased action to tackle the growth in hate crime for many years and transformative action must now be taken to tackle not only this incident but the hugely worrying growth in Islamophobia.
"Many will feel terrorised, no doubt be angry and saddened by what has taken place tonight.
"We urge calm as the investigation establishes the full facts, and in these last days of Ramadan, pray for those affected and for justice."
Mohammed Shafiq of the Ramadhan Foundation, a Muslim organisation which speaks out against extremism, said: "I utterly condemn the senseless and evil van attack against Muslim worshippers outside the Finsbury Park Mosque in London.
"According to eyewitnesses this was a deliberate attack against innocent Muslims going about their life.
"We should make clear that if this attack is confirmed as a deliberate terrorist attack then this should be classed as an act of terrorism.
"The British Muslim community requires all decent people to stand with us against this evil violence.
"Rampant Islamophobia has been on the rise for a number of years and those on the far right have perpetuated hatred against Muslims. They should be called out for their hatred.
He said that with unity and tolerance people would get through difficult times. "We will not allow these far right extremists to divide our diverse communities," he said. "Enough is enough, my condolences and prayers for all the victims and their families."
Meanwhile, chairman of the mosque at Finsbury Park, Mohammed Kozbar, tweeted: "Our thoughts and prayers with those who got injured and affected by this cowardly attack in Finsbury Park area, many casualties in the floor."