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This is the BBC news. Hello, I'm Jonathan Izard.

The Prime Minister of New Zealand Jacinda Ardern has reaffirmed that her government will move quickly to change gun laws following the attacks on mosques in Christchurch in which fifty people were killed.

Speaking ahead of a cabinet meeting, she said New Zealanders were asking why people were able to buy military-style semi-automatic weapons.

People in Christchurch have been returning to work and schools as our correspondent Rupert Wingfield-Hayes reports.

It was a very somber morning assembly at the Cashmere high school.

Principal Mark Wilson had to tell his students that two of their classmates had been killed in Friday's attack on the city's mosques.

One of the boys had fled with his family from the civil war in Syria.

This afternoon, hundreds of children from schools across the city will hold a vigil close to the Al Noor Mosque where their classmates died.

As over the weekend, the people of Christchurch appear determined to show the world they will not be defined by the horrific crime committed here on Friday.

Police in northwest England say they have made four arrests in connection with incidents of alleged hate crime in which the New Zealand attack was mentioned. In one incident, a taxi driver was allegedly abused by members of the public.