Two of the terrorists were killed by police clearing the Bardo Museum.

It appears those arrested either fled the scene or played a supporting role.

The names of the four people arrested haven’t been released.

And no organisation has claimed responsibility for the attack.

Authorities have increased the death toll to 23.

Twenty are tourists. This morning officials were saying a South African was included in this number made up of visitors from Japan, Colombia, Poland, Britain, Spain

They have not confirmed this.

The dead do include terrorists Yassine Laabidi and Hatem Khachnaoui who were killed as security forces stormed the museum.

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