An Australian teenager dubbed "Egg Boy" for cracking an egg on the head of a controversial far-right politician said he has given almost A$100,000 (€62,000) donated for his legal expenses to support victims of the Christchurch mosque shootings.

Will Connolly, 17, came to prominence when he "egged" Senator Fraser Anning at a news conference after Mr Anning had said letting "Muslim fanatics" migrate to New Zealand was the cause of the mosque shootings in March.

Police cautioned the teenager over the incident but he quickly drew support from all corners of the globe.

Donations flooded in to fund his legal defence.

However, Will Connolly said late yesterday he would give away A$99,922 that he had received because he was no longer required to face court.

"I decided to donate all monies to help provide some relief to the victims of the massacre ... it wasn't mine to keep," he wrote on his Instagram account.

"To the victims of the tragedy, I wholeheartedly hope that this can bring some relief to you."

A lone gunman armed with semi-automatic weapons targeted Muslims attending Friday prayers on 15 March, killing 51 worshippers and wounding dozens. The attack was broadcast live on Facebook.

Australian Brenton Tarrant has been charged with 51 murders and engaging in a terrorist act.

He has not been required to submit a plea and is due to appear in court again on June 14.