The migrants from various African countries – including 79 women, 11 of them pregnant – were found in seven inflatable boats near Sabratha, west of the capital Tripoli, spokesman Colonel Ayoub Qassem told the agency.
It comes as the UN’s first World Humanitarian Summit is due to open in Istanbul.
All of the migrants “were handed over to the authorities for transfer to shelters, according to Qassem.