The Mumbai Police imposed section 144 of the Criminal Procedure Code in Aarey Colony and surrounding areas on Saturday, banning unlawful assembly, following strong protests by activists against the felling of trees in the green zone for a Metro car shed, an official said.

Dilip Sawant Additional commissioner of police (North) said, "To maintain the law and order situation in the area, we have detained several people from the intervening night of October 4 and 5. We have also released most of them and rest will be released soon. And to prevent activist from getting into Aarey colony we have cordoned off the area. An FIR registered under sections 332, 353, 143 and 149 of Indian Penal code."