Facebook has promised to explore restrictions on live-streaming, two weeks after it was used during gun attacks on two mosques in Christchurch, New Zealand.

Chief operating officer, Sheryl Sandberg said the social media giant agreed with calls it must do more.

Fifty people were killed in the Christchurch shootings, and the original video of the attack was viewed four thousand times before it was removed.

Meanwhile, New Zealand is to review inadequate laws on hate speech. Justice Minister, Andrew little said the current laws did not tackle the evil and hateful things that are done online and that the government and the Human Rights Commission would work to bring forward proposals by the end of the year.

More than twenty thousand people attended a memorial service in Christchurch last Friday to honour the fifty victims of the March 15 shooting.

Of the dozens injured, twenty-one people remain in hospital, three of them in intensive care.

Miss Sandberg said that restrictions will depend on factors such as prior Community Standard violations.