At least 50 people were shot and killed while attending prayer sessions in mosques in Christchurch, with a further 50 injured, including some who remain in critical conditions.

Less than 24 hours after the live-streamed shooting, bouquets of flowers and notes of sympathy and support had been left outside the gates of Orange's Peisley Street mosque.

Khalid Tufail, president of the Regional NSW Islamic Centre and a leader in his congregation, said the gestures had touched the city's Muslim community in its hour of need.

"We are thankful for all the love, support and cooperation. It has been something extraordinary, enormous," he said on Sunday morning.

"I am so happy that people seem willing to share that burden of grief."

Mr Tufail lives adjacent to the mosque, and said he first saw the flowers and cards when he returned home from work on Saturday afternoon.

He said they were symptomatic of the "big support from right across the community" which had been forthcoming since Friday's attack.

Representatives from both Central West Police District and Orange City Council also touched base with Mr Tufail in the aftermath of the attack, extending both their condolences and offers of assistance should it be required.

Police officers inspected the mosque and surrounding property on Friday evening, declaring it safe, while also recommending the mosque's leadership institute additional safety measures in the future.

For the sake of his congregation, which can number up to 40 during Friday prayers, Mr Tufail was happy to comply.

"We will look more carefully at locking doors and gates when in prayer in the future," he said.

"I would love to go the other way - to throw the doors open - but it is better to be on the safe side."

Mr Tufail said the anonymous gestures of support were in keeping with the relationship he and his fellow practitioners had forged with the community since the mosque opened its doors.

He paid special tribute to his "beautiful neighbours", who have kept an eye on the off-street premises and its members since it opened in October, 2015.