Highway 4 south of Cadillac was closed Tuesday afternoon after what the RCMP termed “a serious collision.” A media release issued by the Mounties didn’t say how many vehicles were involved or if there were any injuries. According to the Highway Hotline, all lanes of the road were closed and detours were in place. The RCMP said drivers could expect delays in the area. Cadillac is about 65 kilometres south of Swift Current.