Ankara, March 18 (IANS) At least four people, including a police officer, were killed in two gun attacks in Turkish capital Ankara on Friday.

A police officer opened fire and killed his female colleague and another civilian in Dikmen district of Ankara. The area has been cordoned off, Xinhua reported.

Meanwhile, a person released from prison shot and killed a civilian, injured another and then committed suicide in Mamak district of Ankara.

Ankara has been on high alert after the Kurdistan Freedom Hawks (TAK), a group affiliated with the Kurdistan Workers Party (PKK), killed 37 in a car bomb attack in the city on Sunday.