Witnesses told police three cars were seen driving side by side at Glenbalbyn before a two car crash last Saturday which claimed the lives of Fred and Gary Whearem.

Fred Whearem, 30, will be farewelled at a service at the Mechanics Institute Hall in Wedderburn at 11am Saturday.

A service will be held for Gary Whearem, 55, at the Numurkah Lawn Cemetery 2pm Wednesday.

Two Melbourne police officers were in Wedderburn on Friday to interview witnesses.

Police had received reports of an ongoing family feud before the crash.

Officers are investigating what happened in the lead-up to the double fatality and expect to take statements from 10 people.

Charges have not been laid.