SAN JUAN, May 8 (AP) A Kuwaiti freed from Guantanamo Bay carried out a suicide car bombing recently in Iraq, the US military said Wednesday, confirming what is believed to be the first such attack by a former detainee at the US military detention center in Cuba.

Abdallah Salih al-Ajmi took part in one of three suicide bomb attacks last month that targeted Iraqi security forces in the northern city of Mosul, said a military spokesman in Baghdad. At least seven people were killed in the attacks.

Al-Ajmis American lawyer said incarceration at Guantanamo may have turned the Kuwaiti into a terrorist. But the US military says he was already an enemy combatant when he was brought to Guantanamo in 2002 after being captured in Afghanistan.

Up to 36 former Guantanamo detainees have resumed hostilities against the US, including some who have been taken back into custody or killed, the Pentagon says. Al-Ajmi is apparently the first to have become a suicide bomber, said a Pentagon spokesman.

Military documents show al-Ajmi had a history of discipline problems at Guantanamo Bay, where he was held for more than three years.

A lawyer who represented al-Ajmi and other Kuwaiti prisoners at Guantanamo, said his client once appeared for a meeting with a broken arm and that al-Ajmi said he had suffered the injury when guards tried to stop him from praying.

Despite his problems at Guantanamo, in 2005 al-Ajmi was transferred to Kuwait, which was supposed to ensure he would no longer pose a threat.

In May 2006, a Kuwaiti court acquitted him of being a member of al-Qaida and raising money for the terror organization. The court also acquitted four other former Guantanamo prisoners.

Dubai-based al-Arabiya television last week reported al-Ajmi had carried out a suicide attack, but the US military could not confirm it until Wednesday.

The three suicide car bombings last month killed at least seven people and wounded 28, Mosul officials said. It was not yet known which one al-Ajmi allegedly carried out.