NIAMEY, Niger (AP) _ Rebels attacked a police headquarters to try to seize arms for a guerrilla campaign, and 12 people were killed, President Ali Saibou said Tuesday.

He said six rebels, three security force members and three civilians died in the attack, which occurred Monday at Tchintabaraden, 642 miles northeast of Niamey.

The rebels seized six weapons before security forces put down the assault and arrested several attackers, Saibou said. Among those arrested was Mohamed Adullahi, former minister of public and semi-public corporations.

The rebels claimed membership in the Revolutionary Movement for the Liberation of Niger, an organization the government says is backed by Libya.

Saibou told deputies in the national assembly the rebels planned to use the weapons for attacks on government facilities, including the uranium mining center at Arlit, the main foreign-exchange earner for the impoverished Sahel nation. Arlit is about 240 miles northeast of Tchintabaraden.