One person is dead and another is seriously injured after a rollover accident Wednesday night on Route 25 in Onset, according to state police.

Timothy S Melcher II, 24, of Cotuit was pronounced dead at the scene. A 20-year-old Wareham man, whose name is currently being withheld, was transported to Rhode Island hospital by helicopter with serious injuries, according to state police.

Police said early investigation suggests the driver of the van, a 2008 GMC Savanah van, lost control of the vehicle and that both passengers were ejected from the van. It remains unclear which occupant was driving the van, police said.

State troopers from the Bourne barracks arrived at the scene at 7:37 p.m. The cause of the crash remains under investigation and no charges have been filed at this time, police said.

Wareham Week will continue to update this story as more information becomes available.

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