The man was nabbed by the by Air force personnel and handed over to the police for detailed interrogation, defence spokesperson Lt Col Manish Ojha said.
Jaisalmer Superintendent of Police (SP), Rajiv Pachar said they are interrogating the accused jointly with the intelligence agencies.
"The man was taking photographs of some construction which was going around the Air Force station area. His motive is being ascertained," the SP said.
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The SHO of Lathi police station in Jaisalmer district, Amar Singh, said the man was working as a labourer at a construction site in the restricted area of the air force and was clicking pictures with his mobile phone.