Security forces have arrested five people in connection with an attack this week at a military base in Iraq in which four US troops and a US contractor were wounded, Iraqi officials said on Thursday. The arrests were announced by the Iraqi Security Media Cell, an official body responsible for disseminating security information. “After in-depth legal investigations and listening to witnesses’ statements, … five of those involved in this illegal act were arrested,” the Security Media Cell added in a statement. In Monday’s attack, two Katyusha rockets were fired at Ain al-Asad airbase in the we…