Kulachi is a city named after the Kulachi tribe, and is the headquarter of Kulachi Tehsil of Dera Ismail Khan District in Khyber-Pakhtunkhwa province of Pakistan. It is located at 31°55′49″N 70°27′31″E at an altitude of 209 metres. From Wikipedia
Islamabad is using the raid to press Afghanistan to prevent cross-border sanctuaries.