Gunmen on Thursday shot dead nine police and prison staff, and wounded three others after storming a building in Pakistan's eastern city of Lahore, police said. It was the second attack in three days on security personnel in the province of Punjab, raising fears of a fresh wave of violence, according to Pakistan's (Geo news). The attackers arrived on motorbikes and targeted a building in the densely populated area of Ichhra, where up to 35 police and prison staff were living, mostly officers from the Khyber Pakhtunkhwa who were in Lahore for training. "The gunmen came early in the morning, entered the building and opened fire," Lahore police chief Aslam Tareen said. There was no immediate claim of responsibility. The gunmen fled and Tareen said police were investigating who was responsible.