When the final stronghold of Moammar Gaddafi loyalists fell to the Libyan fighters Thursday, it is believed the ousted leader was captured and killed in the fighting.

Mutassim Gaddafi. (Luigi Costanzini/DAPD)

Mutassim Gaddafi was also found dead in Sirte, according to the Libyan information minister, along with several major Gaddafi loyalists.

(Video has emerged on YouTube that purportedly shows Mutassim’s dead body. See it here.)

Reuters reports that Abubakr Yunus Jaber, chief of Gaddafi's armed forces, was found dead in Sirte, and that Moussa Ibrahim, a former spokesman for Gaddafi, was captured.

Al-Jazeera reports that Abdullah Senussi, Gaddafi’s ruthless brother-in-law and right -hand man, has also been killed..

Here’s more about the reportedly captured and killed loyalists who made up Gaddafi’s coterie:

Mutassim Gaddafi:

Gaddafi’s fifth son and the former National Security Advisor, Mutassim met in 2009 with U.S. Secretary of State Hillary Clinton in the highest-level diplomatic exchange between the two countries in recent years. He also once met with Sens. John McCain (R-Ariz.) and Joe Lieberman (I-Conn.)

Other Libyan officials reportedly had a number of problems with Mutassim, including his relentless womanizing, inability to understand basic abstracts on current events, and overreaching of his National Security Advisor role, especially in 2008 when he requested more than $1 billion from the National Oil Corporation to form his own special forces brigade.

Mutassim was also believed to have been sent to Egypt at one point after attempting to wrest control of Libya from his father, but the two later reconciled.

He is now believed dead.

Moussa Ibrahim:

As the Libyan Minister of Information and official spokesman for Gaddafi, Ibrahim has been one of the most high-profile loyalists throughout the Libyan uprising, with most reports on Gaddafi’s whereabouts or speeches coming through him.

Moussa Ibrahim (AP)

The spokesman had become increasingly hostile to the West over the last several months, often delivering angry lectures to foreign correspondents and blaming NATO and the West for the ongoing war.

He is now believed captured.

Abubakr Yunus Jaber:

Jaber has been the head of the Libyan army since the 1970s and was among the original members of the Revolutionary Command Council led by Gaddafi. Most recently, he served as Gaddafi’s defense minister.

In June, it was reported that Jaber was imprisoned or executed by Gaddafi for refusing to carry out orders to kill protesters.

Jaber was later discovered not to have been killed, and was seen on state television telling members of the Libyan army who had defected to join the rebels that they would be forgiven if they returned to the regime.

He is now believed dead.

Abdullah Senussi:

Widely recognized as Gaddafi’s right-hand man, Senussi was also Gaddafi’s brother-in-law — married to Gaddafi’s wife’s sister.

With a reputation for brutality that stretches back to the 1970s, Senussia was convicted in France in absentia for helping in the 1989 bombing of a passenger plane over Niger that killed 170 people. He is also believed to have been behind the massacre of some 1,200 prisoners at the infamous Abu Salim jail in Libya in 1996, and the alleged plot to assassinate Saudi Arabia’s Crown Prince Abdullah in 2003.

Although he has been described as Libya’s head of military intelligence and head of internal security, his official title has never been established.

Senussi has also been blamed for many of the deaths of Libyans in Benghazi and for recruitment of foreign mercenaries. Since May, he has been wanted by the International Criminal Court for charges of crimes against humanity.

Senussi is now believed dead.