Violence in Iraq killed nine security forces members Saturday, among them four police who died in an attack by suicide bombers on a base north of Baghdad

Violence in Iraq killed nine security forces members Saturday, among them four police who died in an attack by suicide bombers on a base north of Baghdad, officials said.
  
Five suicide bombers, dressed in SWAT uniforms, attacked a base in Baiji in the morning, while most of its forces were out on a mission.
  
Police killed one of the bombers, who were on foot, but the others managed to detonate their explosives inside the base.
  
In the northern province of Nineveh, gunmen killed two prison guards and soldier, while a roadside bomb left two more soldiers dead.