A teenage boy has been charged with murder after a Church of Scientology member was stabbed to death at the organisation's Australasian headquarters in Sydney.

The 16-year-old was apparently trying to stop his mother from taking part in the Church's 'purification process'.

A 24-year-old Taiwanese national was stabbed in the neck with a kitchen knife while escorting the teen down the driveway after he was asked to leave the premises.

He died in hospital later that day.

A 30-year-old man also injured in the attack has been discharged after being treated for minor injuries.

The boy has now been charged with murder and has been refused bail to appear at a Children's Court today.