A suspicious helicopter today landed at Harne-Palde in coastal Ratnagiri district of Maharashtra and two unidentified persons allegedly conducted recce of the area after disembarking from it, police said.
The Mumbai and Goa Air Traffic Control and Navy have been alerted after the incident, they said.
According to locals, the chopper landed near beach of Harne-Palde at Dapoli in the afternoon, they said.
"Two persons moved around in the area for about 5-10 minutes after alighting from the helicopter. They then boarded it and flew towards an unidentified location," Ratnagiri SP Pradip Raskar told PTI.
"We took the matter seriously and have informed the ATC of Mumbai and Goa and also Navy officials," he said.