The Iranian military was so apprehensive about the threat of an Israeli airstrike on its nuclear installations in 2007 and 2008 that it mistakenly fired on civilian airliners and, in one instance, on one of its own military aircraft, according to classified American intelligence reports.

The civilian planes were fired on by surface-to-air missiles and antiaircraft batteries and intercepted by Iranian fighter jets.

“Iranian air defense units have taken inappropriate actions dozens of times, including firing antiaircraft artillery and scrambling aircraft against unidentified or misidentified targets,” noted a heavily classified Pentagon intelligence report, which added that the Iranian military’s communications were so inadequate and its training deficiencies so significant that “misidentification of aircraft will continue.”

At the time, there was growing concern in Israel and the United States over Iran’s nuclear program and discussion of a military response.