All of the victims were from the eastern Punjab province, Kurd said.
A second attack in which armed men killed six people in Quetta on Saturday was also reported by the Associated Press news agency.
The victims were painting a home which was stormed by the assailants, who injured three other people, according to Hamid Shakeel, a senior police official.
Quetta is the capital of Baluchistan province, close to the border with Afghanistan.
Saturday is Independence Day in Pakistan, the celebrations for which have been muted as the country is currently suffering its worst ever flooding since becomming a state.