The country is in shock after multiple people were killed and injured as gunmen opened fire inside two mosques in the southern city.
Police say they have four people - three men and a woman - in custody and have impounded several vehicles with improvised explosive devices attached to them.
Australian Prime Minister Scott Morrison has confirmed one of the men taken into custody is an Australian citizen, describing him as a "right-wing terrorist".
The Australian Federation of Islamic Councils has extended prayers and thoughts to the victims and survivors, their families and the people of New Zealand.
President of Muslims Australia, Dr Rateb Jneid, is encouraging all mosques and places of worship in Australia to be extra vigilant, and for members of the Muslim community to be particularly mindful of their safety in the coming days.
