Mark Zuckerberg has admitted that Facebook has a lot more to do to deal with violent videos after footage of an Easter Sunday murder was posted on the social network.

“Our hearts go out to the family and friends of Robert Godwin Sr. We have a lot of work and we will keep doing all we can to help prevent tragedies like this from happening again,” Mr Zuckerberg told the audience at F8, Facebook’s developer conference.

On Sunday, it took Facebook two hours to remove a video, posted by Steve Stephens, of the 37-year-old killing Mr Godwin, 74, in Cleveland.

Before his account was taken offline, Stephens also uploaded a Facebook Live video boasting of killing 15 people, although police have not confirmed any other murders.

The incident raised new questions about Facebook’s ability to police the millions of hours of video uploaded to the social network.

“We are reminded of this this week by the tragedy in Cleveland,” Mr Zuckerberg said.

The video posted by Steve Stephens on Sunday credit: Reuters

Shortly before the F8 conference began, Pennsylvania police announced that Stephens had taken his own life after a police chase, marking the end of a three-day manhunt.

On Monday, Facebook said it would make it easier for users to report videos and speed up the process of reviewing items once they are reported

"We prioritise reports with serious safety implications for our community, and are working on making that review process go even faster," Justin Osofsky, Facebook's vice president for global operations and media partnerships, said.