Judicial officials say an arrest warrant has been issued for a former Lebanese MP over his alleged involvement in the kidnapping of late Libyan leader Moammar Gadhafi's son.

The officials, who spoke on condition of anonymity in lines with regulations, said the warrant was issued Monday, four days after former legislator Hassan Yacoub was detained on suspicion of involvement in Hannibal Gadhafi's "kidnapping."

Local media reported that Gadhafi was brought from Syria to Lebanon in Yacoub's car.

Shiite militants captured Gadhafi earlier this month and questioned him about the decades-old disappearance of a Lebanese Shiite imam in Libya. They later handed him over to Lebanese police.

Gadhafi was three years old when Imam Moussa al-Sadr disappeared with two companions, including Yacoub's father, during a 1978 official visit to Libya.