WASHINGTON – An independent panel charged with investigating the deadly Sept. 11 attack in Libya that killed a U.S. ambassador and three other Americans has concluded that systematic management and leadership failures at the State Department led to “grossly” inadequate security at the mission in Benghazi.

“Systematic failures and leadership and management deficiencies at senior levels within two bureaus of the State Department resulted in a Special Mission security posture that was inadequate for Benghazi and grossly inadequate to deal with the attack that took place,” the panel said.

The report singled out the Bureau of Diplomatic Security and the Bureau of Near East Affairs for criticism, saying there appeared to be a lack of cooperation and confusion over protection at the mission in Benghazi, a city in Eastern Libya that was relatively lawless after the revolution that toppled Libyan strongman Moammar Gadhafi.