ST. ADOLPHE. MAN. - A major bridge over the Red River south of Winnipeg that's used by hundreds of drivers every day is in danger of collapsing.

Manitoba Highways says the bridge on Provincial Road 210 near St. Adolphe was closed Thursday due to structural problems caused by flooding that destabilized the river bank.

Officials say one of the support beams under the bridge deck had moved about one metre since it was last inspected in late June, and that slippage is still occurring.

The bridge, which was built in the 1970s, has been closed indefinitely and workers have installed concrete barriers to prevent motorists from getting on to the bridge.

Around-the-clock security is also in place to keep curious onlookers away.