Islamabad: Afghan forces today opened fire on Pakistani security personnel in the restive Balochistan province, killing at least three persons, including a woman, and injuring 17 others, officials said.

The Afghan troops started shelling in Kali Luqman and Kali Jahangir area of Chaman district. Security officials said that the purpose was to target two Pakistani check posts in the area. Pakistan forces retaliated to the fire.