The man purchased some silver items from a shop yesterday and enquired about the Indian Air Force station from the shopkeeper, they said.
According to a police official, he also offered extra money to the shopkeeper.
After the man left, the shopkeeper informed the police following which the footage of the CCTV cameras installed in the shop and other areas was examined, the official said.
"Police got information about a suspicious man and he is being searched for on the basis of the CCTV footage," Superintendent of Police, Jaisalmer, Rajiv Pachar said.