There are multiple fatalities after shootings at two mosques in the city of Christchurch, police in New Zealand have said, the BBC reports.
New Zealand's Prime Minister Jacinda Ardern said 40 people have been killed and more than 20 seriously wounded after two mosque shootings in Christchurch, New Zealand.
She described this as one of the country's "darkest days".
Three men and one woman are in custody, police commissioner Mike Bush said, but warned more suspects may be at large.
Australia's Prime Minister Scott Morrison said one of those arrested was an Australian citizen.
He described the suspected attacker as an "extremist right-wing violent terrorist".
Authorities have advised all mosques in the city to shut down until further notice, saying this was an unprecedented act of violence.