A man allegedly tied to a chair and held captive before being hit and killed by a truck has been revealed to be a Brisbane private schoolteacher.

Anthony Stott, 43, of Fortitude Valley, was tied up at a Round Mountain property in northern NSW before being hit by a semi-trailer on the M1 Pacific Highway at Cudgera Creek at 7am on Monday morning, NSW Police said.

Detective Acting Superintendent Brendon Cullen said Mr Stott’s silver BMW was found on the highway about 2am that same morning.

“We believe he was detained against his will at that premises prior to his death … these circumstances are very troubling,” Acting Supt Cullen told reporters on Wednesday.

It’s not known how he got to and from the property. It’s also unclear if he was released or broke free from the chair.

Mr Stott was last seen after he flew in to Brisbane Airport from Sydney about 3pm on Sunday, following a trip from Peru, The Courier Mail reported.

Supt Cullen said police were not ruling out illicit drugs being involved.

It’s understood police were led to a property on Kanes Road, in the Tweed shire, where they arrested a 38-year-old woman and a 46-year-old man.

The pair were charged with taking or detaining a person with intent to obtain advantage.

They were refused bail to appear at Tweed Heads Local Court on February 17.

Mr Stott’s relationship with the pair remains unclear.

“How he ended up at the property is unclear to us — that’s what we’re seeking assistance with,” Acting Supt Cullen said.

“We don’t know what that relationship is, how he ended up in the house or why.”