Washington ? Blackwater USA is an out-of-control outfit indifferent to Iraqi civilian casualties, according to a critical report released Monday by a key congressional committee.

Among the most serious charges against the prominent security firm is that Blackwater contractors sought to cover up a June 2005 shooting of an Iraqi man and the company paid, with State Department approval, the families of others inadvertently killed by its guards.

Blackwater has had to fire dozens of guards over the past three years for problems ranging from misuse of weapons, alcohol and drug violations, inappropriate conduct and violent behavior, says the 15-page report from the House Oversight and Government Reform Committee.

Just after the report was released, The Associated Press learned the Federal Bureau of Investigation is sending a team to Iraq to investigate an incident that has angered the Iraqi government.

On Sept. 16, 11 Iraqis were killed in a shoot-out involving Blackwater guards protecting a U.S. diplomatic convoy in Baghdad. Blackwater says its guards acted in self-defense after the convoy came under attack. Iraqi witnesses have said the shooting was unprovoked.

The FBI team was sent at the request of the State Department and its findings will be reviewed for possible criminal liability.

The 122 personnel terminated by Blackwater is roughly one-seventh of the work force that Blackwater has in Iraq, a ratio that raises questions about the quality of the people working for the company.

The only punishment for those dismissed was the termination of their contracts with Blackwater, says the report, which uses information from Blackwater’s own files and State Department records.

The report, prepared by the majority staff of the committee, also says Blackwater has been involved in 195 shooting incidents since 2005, or roughly 1.4 per week.

In more than 80 percent of the incidents, called “escalation of force,” Blackwater’s guards fired the first shots even though the company’s contract with the State Department calls for it to use defensive force only, it said.

The staff report says Blackwater has made huge sums of money despite its questionable performance in Iraq, where Blackwater guards provide protective services for U.S. diplomatic personnel.