New Delhi:- A bridge over the Yellowstone River collapsed on Saturday morning, sending at least seven railcars carrying hazardous materials into the river. Officials said the worst-case scenario (sodium bisulfate spilling into the river) had been averted, but they were conducting water tests because cars carrying asphalt and molten sulfur had been "endangered." The collapse also cut a trunk fiber optic cable through Montana, disrupting Internet access for Globalnet customers. 

Montana cut off supply from the river on Saturday morning and temporarily closed a water treatment plant, but officials said it restored supply and resumed processing hours later. Laurel officials visited the derailment site and inspected the water system, the statement said.

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Yellowstone County officials said in a statement that the Yellowstone County water treatment plant was operating normally as officials monitored the river for signs of pollution. Stillwater County officials said the derailment and bridge collapse occurred around 6 a.m. near the community of Reed Point, which borders Yellowstone County. A statement on Saturday said the bridge over the Yellowstone River was a railroad bridge.

The National Transportation Safety Board said in a statement Saturday night that it would send a team to investigate the derailment. The Federal Railroad Administration is leading the investigation, according to the NTSB. It is not immediately clear what caused the collapse or derailment in the first place. 

Officials said Monday that work was underway to remove a railcar laden with hazardous materials that fell into the Yellowstone River in southern Montana after a bridge collapsed over the weekend.

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In a joint statement with the Montana Rail Link, U.S. Environmental Protection Agency spokeswoman Beth Archer said the Montana Rail Link has a recovery plan in place and will reduce freight in the area to limit supply chain disruptions. It said it was working with unions and BNSF Railways to reroute trains. Department of Environmental Quality and Montana Rail Link.

Officials said contractors and large cranes are on site to stabilize the vehicles and remove them from the river as soon as plans are in place.

Archer said some of the cars that remained on the track were removed from the area and the contents of the two cars containing the sodium Hydrosulfide were transferred to other cars for safe transport, Archer said. CEO Joe Lashikotte said at a press conference that Montana Rail Link will cover all cleaning costs. 

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The Montana River accident will be covered by the officials who are responsible for that and also the billings will be filled on them. They have started to clean the river and after that, the water supply that has been stopped will be started again after the work.