The Bruce Highway has reopened at Elimbah after a horror crash that killed one man and injured another motorcycle rider on Sunday.

Police said preliminary investigations suggested five motorcyclists were travelling together in a group, making their way towards Brisbane from the Childers area.

"It appears as they approached the bridge over Beerburrum Creek, one of the motorcycles has veered right for unknown reasons, hitting a guard rail," a police statement said.

"A second motorcycle has collided with the first, knocking the rider off.