By Atila Altuntas

STOCKHOLM

A mosque in northern Finland was attacked by a smoke bomb on Tuesday, according to Finnish police.

The attacker threw a smoke bomb through the mosque's window, shattering it, in the city of Oulu early Tuesday, said a statement by the Oulu Police Department.

The statement said there were no casualties but material damage.

According to video footage, the assailant was wearing a dark-colored jacket and a white hat, the statement added.

Abdul Mannan, the mosque's imam, said this was the ninth attack the mosque has suffered in the last two years.

Oulu is home to some 3,000 Muslims, and the mosque is used by about 1,000 people, according to local press reports.