In a shocking incident a mentally challenged man went on killing spree, murdering 6 people within two hours at separate locations in Palwal in Haryana on Monday. Of the six people killed three were security guards. The killer is said to have used an iron rod to kill people. Five bodies have been sent to the hospital for postmortem. All the murders took place between 2 am and 4 am on Monday. According to initial reports, all the victims were attacked by an iron rod. Watch this video to find out more about the incident.