MAKHACHKALA, Russia — Police in southern Russia say a female suicide bomber has killed one policeman and wounded six others during an attempt to enter a police station.Regional police spokesman Vyacheslav Gasanov said the bomber blew herself up Monday in the central village of Gubden in Dagestan. He said the bomber tried to enter a local police station, but was stopped by a police patrol.Dagestan is the largest province of the predominantly Muslim Northern Caucasus region and is beset by almost daily violence that stems from two separatist wars in neighboring Chechnya.Also Monday, a suspected Islamic militant was killed in a shootout with security forces outside Dagestan's capital, Makhachkala. Gasanov said two policemen were wounded during the shootout.