A bomb attack in southeastern Turkey killed six police officers and injured four others on Monday, Dogan News Agency reported.An explosion took place when a suspected bombing truck of the outlawed Kurdish Workers' Party (PKK) militants hit a police shuttle bus at 5.45 p.m. local time (1445 GMT) in the province of Bingol, Xinhua news agency quoted the report as saying.Ambulances and firefighters soon arrived at the explosion scene on the ring road about 15 km from Bingol Airport.The injured were sent to Bingol State Hospital, and investigation has been launched to the attack.Meanwhile, the social media account of a Kurdish fighter "Mitanni" claimed that the attack had killed 10 police and injured six more.The PKK is listed as a terrorist organisation by the United States, the European Union and Turkey.