Comox Valley RCMP releasing details about an incident Monday afternoon on Highway 19.

Four suspects were arrested after an erratic driving complaint led police into a robbery investigation.

Comox Valley RCMP received a complaint of erratic driving Monday morning with one vehicle chasing another on Highway 19 near Black Creek.

A major police response ensued after a caller told police that this may be the result of an armed robbery.

Comox Valley and Campbell River RCMP along with the BC Highway Patrol found a suspect vehicle near Cranberry Road.

Four suspects were located and arrested with the assistance of the Island District Emergency Response Team, Police Dog Services and Air 8.

A 25-km stretch of highway was closed for about an hour late Monday afternoon.

The Comox Valley RCMP Major Crime Unit is continuing the investigation.