In Chechnya, a woman suicide bomber detonated explosives Sunday near a security base southeast of Grozny, killing herself and wounding another woman.

Russian and Chechen officials say the attack occurred in Tsatsan-Yurt, 30 kilometers from the regional capital, headquarters of a special security unit attached to Akhmad Kadyrov, head of the Chechen regional administration backed by Moscow.

Mr. Kadyrov is widely expected to run in Chechnya's presidential election, scheduled for October 5.

Officials say guards at the security base were suspicious when the young woman approached them, and fired warning shots in the air. The suicide bomber then detonated the explosives she was wearing.

Last May, a female suicide bomber blew herself up at a crowded Muslim festival, killing at least 14 people in an attempt to kill Mr. Kadyrov.

Women suicide bombers wired with explosives have killed scores of people in Chechnya and elsewhere this year, in attacks aimed at forcing the withdrawal of Russian troops from the region.