A man has been arrested by the FBI over a domestic terrorist attack that led to the shooting deaths of two Queensland police officers.

Constables Matthew Arnold and Rachel McCrow were gunned down in cold blood by Nathaniel, Gareth and Stacey Train after the officers arrived at their Wieambilla property, west of Brisbane, in December 2022.

Neighbour Alan Dare was also shot dead after going to check on the property, with the three Trains killed in a gunfight with specialist police later that night.

Queensland Police said a 58-year-old US national had been arrested last week in Arizona in connection to the religiously motivated terrorist attack.

The arrest comes after Queensland Police investigators travelled to the US to join the FBI and other law enforcement officers.

“The state coroner and families of Constables Matthew Arnold, Rachel McCrow, and neighbour Alan Dare along with other officers involved, have been briefed on the progress of this investigation,” police said on Wednesday.

A police media update will be held at 1430 AEST.

Constables Randall Kirk and Keely Brough escaped the attack, which investigators said was a domestic terror crime motivated by extremist Christian beliefs.