TRIPOLI (REUTERS) - Two Italians have been abducted in an Islamist stronghold in eastern Libya, a security source said on Saturday.

The two construction workers were kidnapped in Derna, east of Benghazi, where they had been working on a road project, the security source said.

"We are trying to establish the identity of the kidnappers, to find out about their demands," the source said.

Derna is a stronghold of radical Islamists in the east of the Opec producer.