NOWSHERA: Three persons, including a woman and her son, were killed and four others injured in a collision between two cars on Nowshera-Charsadda road near Kheshgi Commanderi Camp on Sunday. Umar Farooq of Kheshgi Bala told police that his family was on way home after a gathering at house of a relative when the accident occurred. He added that his wife, son Salman and relative Shahid Rehman died in the road mishap while Gul Rooh, Mehnaz, Fiza and Aimal sustained injuries.