Federal regulators say a Union Pacific line has reopened a day after two trains collided in central Kansas.

The line was reopened early Friday after the railroad replaced 400 feet of track on the main line and 300 feet on a side line. The accident occurred in McPherson County between Canton and Galva.

National Transportation Safety Board spokesman Eric Weiss says the agency has recovered the evidence and video recorders from the locomotives and downloaded information from train signals.

Investigators will be onsite for three to five days recovering perishable evidence and interviewing the crew.

Investigators are also looking into whether the accident could have been prevented by technology called positive train control that has the ability to stop a train before a collision.

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Associated Press information from: KWBW-AM