A fourth man has been charged in relation to the alleged kidnapping and murder of a Sydney grandfather. 

Chris Baghsarian was taken from his North Ryde home in a case of mistaken identity just after 5am on February 13.

The 85-year-old’s abduction triggered an 11-day search, with his remains later found near a golf course in Pitt Town in the city’s north-west.

An aerial image showing police cars and officers in bushland.

Chris Baghsarian’s remains were found in north-west Sydney following an 11-day search. (ABC News)

It is understood his captors’ intended target was a relative of Sydney businessman Dimitri Stepanyan, who also lived nearby.

On Tuesday morning, detectives arrested a fourth man — aged 19 — at Mount Druitt Police Station. 

He was charged with murder and take or detain in company with intent to ransom occasioning actual bodily harm.

Three other men remain before the courts.

He was refused bail and is due to appear in Mount Druitt Local Court today.