Fire italienske oljeservicearbeidere fra selskapet Bonatti ble kidnappet da de vendte tilbake til Libya søndag kveld.
Four Italian construction workers have been kidnapped in Libya, the Italian foreign ministry has said.
They were abducted near a compound owned by Italian oil and gas group Eni in the western Mellitah area, the ministry said.
Italy closed its embassy in Libya in February, calling on Italians to leave because of the dangers to foreigners.
The country is beset with warring factions four years after the civil war that ousted leader Muammar Gaddafi.
They were kidnapped while returning from Tunisia on Sunday evening, La Repubblica newspaper reports.