KITCHENER -- A crash in the Royal City shut down a major intersection this morning.

Guelph police tweeted at 10:20 a.m. that officers closed a portion of Woolwich Street between Speedvale Avenue and Marilyn Drive for a collision investigation.

Witnesses say they saw paramedics performing CPR on someone.

It’s unclear if this person was a pedestrian or someone who was inside a vehicle.

Officials are warning that the road closure will be in effect for an extended period of time.

Police are asking drivers to avoid the area and to take an alternate route.