Delaware State Police are investigating a serious crash involving a pedestrian that occurred today on Route 1 in Rehoboth Beach.

The initial investigation has determined that the crash occurred around noon today, Friday, Feb. 17, 2017, on Route 1 southbound in the area of Holland Glade Road. The crash involved a pedestrian and a semi-truck, but the extent injuries are not yet known.

Route 1 southbound is down to one lane between Sea Air Avenue and Shuttle Road. Commuters are asked to drive with caution and find alternate routes of travel.

The investigation into this crash is in its early stages. More information will be released at the conclusion of the investigation.