The RCMP have not released any information regarding a police incident reported on Highway 19 south of Campbell River.
Several police vehicles, including a tactical armoured vehicle, were seen rushing to the area Monday afternoon.
Witnesses posting to social media reported a large police presence near Cranberry Lane.
Drive BC reported the highway was closed between Iron River Road and Piercy Road, but reopened by 5:30 pm.
Drive BC says the Inland Island Highway was closed from about two kilometres south of Campbell River to six kilometres north of Cumberland, a distance of more than 26 kilometres.