Authorities have evacuated a half-mile (805-metre) area around the chemical spill and the waterway was closed as well.
The US Coast Guard is working with the state Department of Environmental Protection to assess the situation.
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The Republican nominee said that "all she wants to do is campaign" before accusing Mrs Obama of attacking Hillary Clinton.
26 people injured and five people were taken to hospital after a bus crashed into a railway bridge.
Trinity Gay was shot dead in a car park outside a restaurant on Sunday following reports of an exchange of gunfire between two vehicles.