2017 Tikrit attacksOn 4 April 2017, several Islamic State militants disguised as military personnel killed at least 35 people in Tikrit, 14 of which were members of security forces.The attacksThe attack occurred late on the night of April 4, when 10 IS militants disguised in police uniform attacked a security checkpoint and stormed the house of a police colonel in Zuhour, a neighborhood in Tikrit. The clashes resulted in the killing of at least five IS militants; three were shot dead, while two others detonated their explosive vests, according to a security source.