A teenager has been arrested after a man was stabbed to death at the Church of Scientology’s Australasian headquarters in Sydney.

Emergency services were called to the religious centre on Greville Street in Chatswood after midday on Thursday following reports of a stabbing.

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The two injured men were taken to Royal North Shore Hospital. One man, aged in his 20s, died at the hospital, NSW Police said in a statement.

The other man suffered a minor injury and is in a stable condition.

NSW Ambulance Acting Deputy Commissioner Tony Gately said one of the victims suffered a “traumatic injury”.

A 16-year-old boy was arrested at the scene and is assisting NSW Police with their inquiries.

The stabbing occurred in the driveway of the sprawling religious centre.

Detectives were seen taking brown paper evidence bags to their cars on Thursday afternoon.

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A young Scientologist, who asked not to be identified, said his mother was inside the facility and he couldn’t get in to see her.

“I came down when the first camera crew showed up but I was told it wasn’t a huge deal,” he told AAP. He was not aware two people had been stabbed.

“It’s a huge building, a lot of people come from around Asia to study here,” he said.

“It offers a lot of services other (Scientology properties) don’t.”

The church on its website says the “Ideal Advanced Organisation in Sydney provides advanced religious services to Scientologists from across Australia, New Zealand and the Asia Pacific region”.

The massive 13,500 square metre building – which was opened in September 2016 – is the largest Scientology centre outside the United States.

The site formerly housed the National Acoustic Laboratory and was purchased by the church for a reported $37 million in 2014.

-AAP