Baltimore train derailment

Federal investigators will spend the coming days piecing together what caused a chemical-carrying CSX train to collide with a trash truck, derail and explode at a rail crossing in suburban Baltimore.

A CSX cargo train derailed Tuesday in a Baltimore suburb and the explosion that followed rattled homes at least a half-mile away and collapsed nearby buildings, setting them on fire, officials and witnesses said.

A CSX train hauling coal derailed and fell from a bridge in downtown Ellicott City outside Baltimore, killing two people who were on the tracks and crushing vehicles in a parking lot, authorities said.