The Metropolitan Police force said the suspect was detained on suspicion of arson with intent to endanger life a day after the early-morning fire.

A 21-year-old suspect was arrested Tuesday after the private London home of U.K. Prime Minister Keir Starmer was damaged by a "suspicious" fire, reports say.

British police said on Tuesday they had arrested a 21-year-old man on suspicion of arson after counter-terrorism officers launched an investigation into three fires, including one at Prime Minister Keir Starmer's private home.