Cleveland police has warned residents of the city of a gunman who published a video while killing an old man.

Saudi Arabia’s cultural attaché in the United States has warned students in Ohio, specifically in Cleveland, to beware of a fugitive known as “Facebook serial killer”.

The Attaché on its Twitter account, asked the students to be cautious and careful because of the security situation in the city.

The Attaché reposted a tweet by Cleveland police; warning the residents of the city of a gunman who published a video while killing an old man and saying that he killed another 12.

An American Young man called “Steve Stephenson” killed an old man, and broadcast the crime on Sunday through the live service on Facebook, he said in another broadcast that he killed 12 people and wants to kill more.