"Special teams are on the job and the culprits will soon be apprehended," a senior police official told PTI.
"The probe is still at preliminary stage," he said adding several people are being questioned.
The victim, who was part of a group of German tourists, was allegedly sexually assaulted when she was taking a stroll yesterday alone along the sea shore close to a resort, where she had been staying.
Patrols have been increased as well, the official said.