Farmers from 17 villages were holding protests at 10 spots in the area. The biggest of them was on the Thane-Badlapur highway, where they had blocked traffic. The clashes began when the police tried to disperse the mob.
The protests were over the Navy walling up a 1600 acres of land, which has a British-era aerodrome. The area belongs to the Navy, acquired to build an airstrip in 1942 during the Second World War. The acquisition was made under the powers Emergency Act.
The Navy now wants to build an arms depot and residential housing for its personnel.
The boundary wall, the Defence Ministry said, was being built to "safeguard defence land from further encroachment". "The Maharashtra government is fully aware of the subject case and is providing police protection and support," a statement from the ministry read.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.