A pro-Vidarbha state activist has been detained from Chandrapur district for allegedly posting objectionable remarks on social media against Maharashtra Deputy Chief Minister Devendra Fadnavis and guardian minister Sudhir Mungantiwar and threatening to kill them, police said.

The activist, Babarao Maski, was taken into preventive custody from Rajura town after a case was registered against him on a complaint lodged by BJP activists, a senior police officer said on Tuesday.