Two men have been arrested in connection with the death of Victorian teenager whose remains were found in a shallow mineshaft.

The body of 17-year-old Chelsea Heights boy Cayleb Hough was located in a shallow mineshaft in the Lerderderg State Park in Bacchus Marsh on March 10.

He had been missing since before Christmas last year.

View photos Two men have been arrested in connection with the death of Victorian teenager Cayleb Hough. Picture: 7 News More

A 36-year-old man was arrested at a house in Collingwood on Wednesday, who remains in custody and is assisting police with their enquiries.

Breaking: Two men have been arrested over the death of 17 y/o Cayleb Hough, whose body was found in a mineshaft at Bacchus Marsh.. #7News — Kristy Mayr (@KristyMayr7) April 21, 2016

Detectives also arrested a 28-year-old man at a Gellibrand property, just south of Colac in Victoria's south-west, on Tuesday.

He was interviewed by detectives and released pending further enquiries.

View photos Cayleb Haugh. Picture: 7 News More

In January, police found the car the Cayleb was riding in when he was last seen in the early hours of Sunday 20 December 2015.

The vehicle was seized from the Gellibrand property and it remains in police possession as the investigation into the teen's death continues.

View photos The teen's body was found after an extensive line search in Victorian bushland. Picture: 7 News More

Information can be provided anonymously to Crime Stoppers on 1800 333 000.

News break – April 21