BAGHDAD: Iraq’s prime minister has ordered security forces to pursue the perpetrators of attacks on military bases hosting international coalition advisers, a government military spokesman said on Monday. The announcement came after a recent spike in rocket and drone attacks against Iraq military bases which host US and other international forces. “Attacks that target Iraqi bases that house advisers from the international coalition in Iraq are unacceptable. They are here based on the invitation of the government,” said a spokesman for Iraqi Prime Minister and commander-in-chief of the Armed Forces Mohammed Al-Sudani. Three military bases were attacked by Katyusha rockets and drones in less than a week, including Ain Al-Asad in western Iraq, a military base near Baghdad’s international airport, and Harir in the northern Iraqi city of Irbil. Iraqi security officials say the prime minister has ordered the stepping up “preemptive security measures” to prevent further attacks on the three Iraqi military bases hosting US and other international forces. Iraqi armed groups aligned with Iran threatened to target US interests with missiles and drones if Washington intervened to support Israel against Hamas in Gaza. There has been an increase in attacks against US forces in Iraq and Syria since the start of the conflict between Israel and Hamas militants in Gaza. The US State Department said on Sunday that US citizens should not travel to Iraq after recent attacks on American troops and personnel in the region. The United States has 2,500 troops in Iraq, and 900 more in neighboring Syria, on a mission to advise and assist local forces in combating Islamic State, which in 2014 seized swathes of territory in both countries.