Vishnu Kedar Roundal, the nayab tehsildar at the Dahanu revenue office, received a call yesterday that some illegal excavation work was going on in his area of jurisdiction.
He was asked to come to the Charoti Naka to check the illegal work, assistant police inspector B T Chowdhary of Kasa police station said.
When Vishnu reached the place, four persons already waiting there in a jeep forced him inside the vehicle and took him to an unknown place in Manor of Palghar taluka where they allegedly forced him at knife point to sign some blank documents, according to the complaint lodged by the victim.
The victim later jumped out of the jeep to escape when it slowed down at some point. However, the four took away the cash that he had and his mobile phone, the complaint said.
Later, he reached the highway and informed Manor police about the incident. A complaint was later registered with Kasa police station.
A hunt is on for the four unknown men, police said, adding offences under sections 392 (robbery), 363 (kidnapping), 504 (intentional insult with intent to provoke breach of the peace) and 506 (criminal intimidation) of the IPC have been registered against them.
Police are also trying to find out if the sand mafia was behind the crime.