A Libyan security source says that 4,000 migrants have been found during raids on people traffickers in the east of Libya.

An Egyptian security source has said that only about half of those rounded up were in Libya illegally - and they were the only ones who'd been deported.

Migration agencies say that there are about half a million migrants in Libya - many of whom are seeking to cross to Europe by boat, while others have found work and settled in the country.