British police have arrested two teenagers on suspicion of arson after a fire damaged one of Europe's biggest mosques.

London's Metropolitan Police said a 14-year-old and a 16-year-old were detained Sunday.

London Fire Brigade said 70 firefighters battled for several hours to put out a fire at the Baitul Futuh mosque in Morden, south London, on Saturday. One man was taken to a nearby hospital suffering from smoke inhalation in the blaze, which damaged administration buildings but not the main worship areas of the mosque.

The mosque was completed in 2003 and serves the Ahmadi community, a minority Muslim sect founded in 19th-century India. The mosque's website says the 5.2-acre (2.1-hectare) site can hold more than 10,000 worshippers.