Police forensic officers inspect the site in frornt of the Sultangazi district police station following an attack on September 11, 2012, in Istanbul.
At least one police officer has been killed and seven people severely wounded after a bomb exploded outside a police station in the Turkish city of Istanbul.
The attack was carried out on Tuesday outside the Sultangazi district police station in central Istanbul.
The bomber “set off the explosives on him after throwing a grenade into the police station and killed one police officer and wounded four others at the entry," Istanbul police chief, Huseyin Capkin said at the scene.
The assailant was about 25 years old and was also killed in the blast, Capkin added.
The wounded were taken to nearby hospitals and the toll was likely to rise as some of them are reported to be in a critical condition.
No group has taken responsibility for the attack yet.
In May, a policeman was killed after two gunmen attacked a police station in the central city of Kayseri and opened fire before setting off a bomb. The Kurdish rebel group, the Kurdistan Workers' Party (PKK), took responsibility for the attack.