Interpol has issued an international alert calling for help in finding and arresting former Libyan leader Moammar Gadhafi's son Saadi.

The international police agency said Thursday it issued a “red notice” at the request of provisional authorities in Libya, where a warrant has been issued for Saadi Gadhafi's arrest.

Interpol says he is wanted in Libya for allegedly misappropriating property and engaging in “armed intimidation” when he headed the Libyan Football Federation.

The agency says it has confirmed reports that Saadi Gadhafi was last seen in neighboring Niger. The alert Thursday seeks the help of countries in the region and those with travel links to Niger, with a view to returning him to Libya if he is arrested.

Niger said two weeks ago it had Saadi Gadhafi in custody and would not send him back to Libya.

Interpol issued similar international alerts earlier this month for Mr. Gadhafi, his son Saif al-Islam and Libya's former intelligence chief.

Mr. Gadhafi's whereabouts remain unknown as National Transitional Council forces continue to clash with loyalists in Sirte and Bani Walid – two remaining Gadhafi strongholds.

There was heavy fighting Wednesday in Sirte, where NATO continued airstrikes against pro-Gadhafi forces. NATO said Thursday its strikes a day earlier hit ammunition and missile sites, as well as a control center.