At least five US personnel were injured in an attack against a military base in Iraq on Monday, US officials told Reuters, as the Middle East braced for a possible new wave of attacks by Iran and its allies following last week’s killing of senior Hamas and Hezbollah members. Two Katyusha rockets were fired at Al-Asad airbase in western Iraq, two Iraqi security sources said. One Iraqi security source said the rockets fell inside the base. It was unclear whether the attack was linked to threats by Iran to retaliate over the killings. On Wednesday, Iran said the US bears responsibility in the ass…