There was no immediate comment from the Tunisian authorities.
Tunisia is grappling with a growing extremist threat that has seen several major attacks claimed by the Islamic State group this year targeting tourists and security forces.
Twenty-one foreigners and a policeman were killed at the Bardo National Museum in Tunis in March and 38 people, mainly British holidaymakers, were gunned down at the seaside resort of Sousse in June.
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Tunisia is grappling with a growing extremist threat that has seen several major attacks claimed by the Islamic State group this year targeting tourists and security forces.
Twenty-one foreigners and a policeman were killed at the Bardo National Museum in Tunis in March and 38 people, mainly British holidaymakers, were gunned down at the seaside resort of Sousse in June.
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