Iraqi major says attacks show how insurgents are resorting to new methods . Police : No one has been killed in the attack, but a police officer was wounded and is being treated at an area hospital for his injuries. Three people are killed , 15 injured in roadside attack in southeastern Baghdad . Pilgrims on way to Karbala for al-Arbaeen , one of holiest days on Shiite calendar .
Iraqi major says attacks show how insurgents are resorting to new methods . Police : Bomber had met at least twice with deputy security chief before blast . Three people are killed , 15 injured in roadside attack in southeastern Baghdad . Pilgrims on way to Karbala for al-Arbaeen , one of holiest days on Shiite calendar .