A veteran al Qaeda operative indicted in connection with the bombings of two U.S. embassies in East Africa is alive and well in Libya, according to Western intelligence sources, CNN reports.

Abu Anas al Libi, 48, has been seen in the capital, Tripoli, the sources say, and there is concern that he may have been tasked with establishing an al Qaeda network in Libya. It's unclear whether Libya's government is aware of his presence, or whether it has been approached by Western governments seeking al Libi's arrest.

One Libyan official said he didn't know whether al Libi was back in Tripoli but was aware that he had been in Afghanistan.

Just when al Libi returned home is unclear. According to one intelligence source, he appears to have arrived in Tripoli in the spring of last year, amid Libya's civil war. According to this source, a Western intelligence agency had placed al Libi under surveillance and had taken photographs of him. But back in December 2010, before the outbreak of unrest, Libyan authorities told the United Nations al Qaeda Sanctions Committee that al Libi had returned, even providing a Tripoli street address for him.

Whether he is still active in jihadist circles is unclear.

Whatever his current activities, al Libi's return to Libya is likely to heighten concern about the growing role of jihadist groups there after the attack on the U.S. Consulate in Benghazi, CNN says.