Tragic details are emerging after the TransCanada Highway was closed for most of the night on Tuesday after an incident that happened around 7:30 at the intersection of Highway #1 and #47 at Grenfell.

We've now learned the reason for the closure of the eastbound lane was a fatal collision involving a semi and a pedestrian.

RCMP say a 16 year old boy was hit by the eastbound semi.

The area was closed until around 2:30 Wednesday.

No other details have been released as RCMP continue the investigation.