LULING, MS (AP) — Three people are missing after two barges collided on the Mississippi River. The Coast Guard said in a news release that crews are searching for three people after two towing vessels crashed near the Luling Bridge in Louisiana. The Coast Guard said one of the vessels sank in the river. A section of the river as closed to boats because of a possible chemical release. Officials say there are no immediate health concerns. The waterworks and industries along the river were told to close water intakes from the river as a precaution.