Those detained included Navi Mumbai Congress Committee president Dashrath Bhagat, Thane Lok Sabha constituency unit president Nishan Bhagat, corporator Santosh Shetty and CIDCO director Namdeo Bhagat, they said.
"Today there was an inauguration of Meenatai Thackeray Hospital. There were around 35 Congress workers who were protesting at the gate of the hospital and were refusing to let the premises be inaugurated. They created ruckus there following which we had to detain 35 workers. But, we let them off later after giving a warning," Nerul police station inspector Nagraj Mazage said.
Naik, the Thane Guardian Minister, had planned the inauguration of the hospital at Nerul to take credit for the project, the release alleged.