Police investigating the deadliest London terror attack in 12 years named the perpetrator Thursday as a 52-year-old British man, Khalid Masood.

“Masood was not the subject of any current investigations and there was no prior intelligence about his intent to mount a terrorist attack,” a Metropolitan Police statement said.

Masood, who was born in Kent and is thought to have been living in the West Midlands, had previous convictions for violence.