One of the two gunmen who killed 17 foreign tourists and two Tunisians at the Bardo museum in Tunis was known to intelligence services, the country's prime minister has said.

Habib Essid told RTL radio today that no formal links to a particular terror group have been established by authorities.

Mr Essid said Tunisia is working with other countries to learn more about the attackers, identified as Yassine Laabidi and Hatem Khachnaoui.

He said Laabidi had been flagged to intelligence, although not for "anything special".

Two of the cruise ships with passengers among the victims have left the port of Tunis.

MSC Cruises said nine passengers from the Splendida were killed, 12 injured and six remain unaccounted-for.

Another ship, the Costa Fascinosa, said 13 passengers had not returned on board when the ship left port overnight.

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