TUNIS (AFP) - Twenty foreign tourists were killed in the attack by gunmen on Tunisia's national museum, the health minister said Thursday in a new toll.

"Thirteen people (killed) have been identified and seven are being identified," Said Aidi said.

He said the dead included three Japanese nationals, two Spaniards, one of them a woman, a Colombian, an Australian, a British woman, a Belgian woman, two French, a Pole and an Italian.

Aidi said a policeman was also killed but he did not mention a second Tunisian victim initially reported by the authorities after Wednesday's attack.

No group has claimed the attack by gunmen in military uniforms who opened fire at visitors as they got off a bus and then chased them inside the National Bardo Museum.