Mexico has disputed El Salvador's allegation that dozens of Central American migrants who stowed away on a cargo train were kidnapped by gunmen.

BBC: Mexico disputes El Salvador claim of migrant abduction

The National Transportation Safety Board has begun an investigation into the cause of the cargo train collision near Chaffee, a small town southwest of Cape Girardeau.

WSJ: Mo. highway buckles after rail cars hit overpass

Rail Accident Investigation Branch inspectors have made five recommendations including proper checks on freight train cargo packing.

BBC: Reading West train derailment caused by poor packing