The Christchurch Muslim community is urging its members to be extra vigilant after an image emerged making a specific threat to members of the Al Noor mosque.
Newshub has chosen not to show the image but it was taken outside the mosque and posted to an online message board.
Anjum Rahman from the Islamic Women's Council said the image was sent to her on Monday morning by someone who'd seen it on an encrypted site.
"That person had also contacted the police - I also forwarded it to my contact from the police as well as alerting community leaders to be vigilant and aware," she told Newshub.
Police said an investigation is underway, adding they take all threats to the community extremely seriously.
"Enquiries are ongoing into the incident," a police spokesperson told Newshub.
"For operational reasons we will not be providing details on security matters ahead of March 15, 2020."
On March 15 last year, 51 people died and 49 were injured in the shootings at Christchurch's Al Noor and Linwood Mosques.
