(CNN) -- A top commander in Somalia's hard-line Islamist militant group al-Shabaab was killed by his own guards, according to Somalia's state radio.

Amar Ibrahim, a Jordanian national, was killed in the Yaqshid neighborhood of the Somali capital city, Mogadishu, residents told Radio Mogadishu, the state radio of Somalia's transitional government. Ibrahim was reported to be a ruthless commander, and his guards killed him in apparent vengeance, according to the report Monday.

There was no immediate reaction from al-Shabaab, a group linked to al Qaeda. Ibrahim replaced former al-Shabaab commander Salah Ali Nabhan, who was killed in a U.S. raid in late 2009 in southern Somalia.