Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

 Photo taken on March 7, 2013, shows the entrance to the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

 Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)

Photo taken on March 7, 2013, shows the damaged working unit and equipments inside the building of al-Assema TV channel in Tripoli, Libya, March 7, 2013. Unknown gunmen stormed the building of al-Assema TV channel in Libya Thursday afternoon, leaving four people kidnapped, witnesses told Xinhua. (Xinhua/Hamza Turkia)