Tunisian police arrested the tourist on Thursday afternoon, according to media reports from Tunisia picked up by media in Switzerland.
He was apprehended after being caught attempting to take pictures of the house of Tunisia’s interior minister, Lotfi Ben Jeddou, and military posts in Lasserine, local radio station FM Express reported.
In the man’s camera police discovered hundreds of images of police stations, government buildings and other structures with strategic objectives, the radio station said.
The suspect was handed over to a team specialized in investigating terrorism.
The Swiss department of foreign affairs was on Thursday trying to clarify the situation with Tunisian authorities.
Meanwhile, Tunisian authorities are investigation the death of a Swiss woman who was found dead in a forest near the town of Hergla.
The woman’s body was found in a ditch, according to Tunisian media reports.
The Swiss was married to a Tunisian and lived in the seaside resort town of Chott Meriem, 50 kilometres to the south of Tunisia.
The Swiss department of foreign affairs have confirmed the victim is a Swiss woman, Blick reported online.
The department has been informed of the case and “is in contact with relatives of this woman,” a department spokesman is quoted as saying.