Destiny Church leader Brian Tamaki says police have revoked his firearms licence.

In a post on social media on Saturday, the church leader said authorities had told him he could never hold a gun again on Friday.

"After holding a firearms licence for many years without issue, Police have now decided I am no longer a 'fit and proper person'," he wrote.

He claimed it was because of his criticism of Indian Prime Minister Narendra Modi.

"I was speaking passionately. I was protesting. I was challenging what I believed needed to be challenged.

"I am now prohibited not only from possessing my own firearms, but from possessing or using a firearm even under the supervision of a licensed firearms holder.

"This follows the temporary suspension issued to me on 30 June and the subsequent submissions made by my lawyer opposing that suspension."

Acting Executive Director of Firearms Safety Authority Bruce Bird said police are unable to comment on an individual case or licensing decisions.

"However, speaking generally, decisions about suspending or revoking a firearms licence are based on a legal standard of whether a person is 'fit and proper' to possess a firearm."