NAIROBI, Kenya — Police in Kenya say they have carried out raids on two mosques in Mombasa, the country's main coastal city, in an operation that killed one person and resulted in 251 arrests.
Police said the Monday raids netted eight grenades and a pistol.
The authorities said more than 500 security personnel took part in the raids.
The police said the person killed had tried to throw a grenade at them as they moved into the Masjid Musa mosque, a place of worship that officials say also harbors radical Muslims.
Mombasa police official Geoffrey Mayek called the raids a "breakthrough" for police intelligence. Officials say that some Kenyan Muslims have links with the Somali terrorist group al-Shabab.