The man arrested after a van rammed pedestrians near a mosque in north London, killing one person and wounding several others, had expressed antagonism toward Muslims in the days before the attack early Monday, according to British media.
A 48-year-old man has been arrested on suspicion of attempted murder.
"He regained consciousness and then, as he regained consciousness, the van drove perpendicular to Seven Sisters Road", said the imam.
She later visited Finsbury Park Mosque where she held talks with faith leaders.
Monday morning, the Muslim Welfare House headlined its website with this message: "All of us at Muslim Welfare House sends our thoughts and prayers to the victims and those injured in the major incident at Finsbury Park".
This attack near a United Kingdom mosque is the 4th terror strike in Britain in 4 months.
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"People are going to wake up tomorrow.communities from all different backgrounds, and they're going to be in shock to hear worshipers in front of a mosque were attacked in the same way that people were attacked on the London Bridge", he said.
"There are a number of casualties being worked on at the scene", London police said, describing it as a major incident.
The incident came after two terror attacks in London in the past three months involving vehicles ploughing into crowds of people, as well as the suicide bombing attack at a Manchester pop concert in May.
"At this stage in the investigation, it is believed that the suspect acted alone, but we are of course investigating all the circumstances leading up to the attack", the statement said.
Mohammed Mahmoud had just finished leading prayers when a panicked worshipper rushed inside the mosque in north London.
One person died at the scene although it is not yet clear if this was the result of the attack. May vowed to provide extra police resources to protect mosques.