At least 31 people were killed and more than 40 others were wounded Wednesday in an attack by the Islamic State terrorist organization on the Iraqi city of Tikrit. A police spokesman in the city said that about ten ISIS fighters, including two wearing suicide vests, infiltrated the city in police uniforms and vehicles. They attacked the home of the head of Tikrit's security services, who was responsible for fighting terror, killing him and four members of his family. The fighters also attacked a police checkpoint in the city located about 175 km north of Baghdad. Three of the fighters were killed in exchanges of fire, two blew themselves up and five others escaped.