The helicopter ran into a powerline and crashed Thursday morning on the Mississippi River near East Alton, Illinois, officials said.

The crash, which happened near the border of Missouri and Illinois, closed a bridge into Illinois. A witness said it “just disintegrated” after coming in contact with a power line.

Two people working on powerlines near the Mississippi River died Thursday when their helicopter hit the lines, crashed into a barge and sparked a fire that belched plumes of black smoke, officials said.