In a joint press conference, Mathura Senior Superintendent of Police Babloo Kumar and District Magistrate Nikhil Shukla denied reports of bullets found from the body of those killed.
Of the 19 whose post-mortem reports are available, 12 died of burn injuries and seven due to injuries received in lathi blows and stone-pelting, they said.
Twenty-nine people - including then SP (City) Mukul Dwivedi and Station House Officer (Farah) Santosh Yadav - were killed during clashes between police and encroachers at Jawahar Bagh in Mathura last week.
Strict action would be taken against those police officers who are found guilty of abandoning the SP and the SHO during the eviction of Jawahar Bagh.
They said the Facebook account of the Ram Vriksh Yadav and his associates would be closed down with the help of cyber cell. The records found there would be used to connect the dots.