They said four persons, including three women, were also injured.
Civilians are not allowed to move in these areas after sunset unless they inform police or the nearest security force picket and they are required to carry 'mashals' in their hands while moving, the sources said.
People came out on the streets in Surankote area to protest the incident, the sources said.
The killed were identified as Badar Din, Khalil Ahmed, Kousar Begum and Haniefa Begum, the sources said.
In an unrelated incident, a terrorist was killed and a BSF constable injured in an encounter in Noushera area in Rajouri district, the sources said.