Kenyan police raided a house Monday in the port of Mombasa (search) where suspected terrorists are thought to have lived, seizing weapons and visa stamps for several countries, the national security minister said.

Acting on a tip, police moved in on the house, finding evidence that "those living there were planning ... acts of terrorism," Christopher Murungaru said in a statement. He did not say where the residents were at the time or whether any were arrested.

Among the items found were AK-47 assault rifles (search), a light anti-tank weapon, a grenade, weapons training literature and the visa stamps, he said.

Hours earlier, he said, police found a suspicious object at a popular tourist resort north of Mombasa on the Indian Ocean and were working to determine whether it was a bomb.

Murungaru commended "the members of the public who volunteered information to the security forces."

On Aug. 1, a suspected terrorist killed himself and a police officer trying to arrest him when he detonated a grenade in downtown Mombasa.

Monday's raid took place in the same leafy Tudor neighborhood where authorities say militants built the car bomb used to blow up a beachfront hotel north of the port on Nov. 28, killing 13 people, including three Israelis.

Five Kenyan men are awaiting trial on murder charges in connection with that attack, the second in Kenya in five years. In 1998, assailants detonated a car bomb outside the U.S. Embassy in Nairobi (search), killing 219 people, including 12 Americans.

Both attacks have been blamed on Al Qaeda (search), which Kenyan and Western officials say has an active network in eastern Africa.