Moammar Gadhafi

(CNN) -- The International Criminal Court has called on Libya to immediately hand over former Gadhafi intelligence chief Abdullah al-Senussi for trial.

The late Moammar Gadhafi, his son Saif al-Islam Gadhafi and his spy chief were all indicted by the ICC for war crimes during the civil war that led to the fall of the Gadhafi regime in 2011.

The ICC and Libya have been engaged in a protracted dispute about where to try Saif al-Islam Gadhafi, who has been in Libyan custody for more than a year.

A similar situation appears to have developed in the case of al-Senussi, who was arrested in Mauritania in March last year.

The Libyan government has insisted it wants to prosecute the cases itself, as it "regards the trial of Saif al-Islam and Abdullah al-Senussi as a matter of the highest national importance, not only in bringing justice for the Libyan people but also in demonstrating that the new Libyan justice system is capable of conducting fair trials (that meet all applicable international standards) in complex cases."

According to court documents published Thursday, the ICC has repeatedly called on the Libyan authorities to meet their obligation to comply with its request for the surrender of al-Senussi.

The papers indicate the Libyan authorities only confirmed to the ICC last month that the spy chief was in their custody and that judicial proceedings were under way in Libya.

Libya has called for the ICC to suspend the order to hand over al-Senussi, but the court in The Hague has rejected its argument.

Meanwhile, defense lawyers appointed to al-Senussi have called for Libya and Mauritania to be referred to the U.N. Security Council over their failure to cooperate with the ICC.

Moammar Gadhafi was killed when he was captured after the war ended.

CNN's Stephanie Halasz contributed to this report.