Delhi Police has registered an FIR against a Delhi University professor for posting provocative content on social media after 'discovery' of 'Shivling' inside the Gyanvapi mosque complex in Varanasi during a video survey.

"A complaint was received last night against one Ratan Lal, Prof of History at Hindu College, DU, regarding a deliberate and malicious post on Facebook intended to outrage religious feelings by insulting a religion or religious beliefs," Deputy Commissioner of Police Sagar Singh Kalsi said.