HARTFORD, Conn. (AP) Two Metro-North derailments in New York have renewed concerns among federal regulators over the commuter railroad's focus on safety.

No one was injured after trains left the tracks at Grand Central Terminal and White Plains, New York, on Wednesday. The Greenwich Time reports the Federal Railroad Administration is investigating.

Mike England, a spokesman for the agency, says the derailments raise new questions about Metro-North's safety program ``in light of their recent safety record.''

Metro-North spokeswoman Marjorie Anders said officials quickly developed an alternate service plan combining New Haven Line trains. She says commuters were delayed for up to 15 minutes.

The two derailments were the fourth in two years for Metro-North. A 2013 derailment in Bridgeport injured scores of passengers and four passengers died as a result of a Bronx, New York, derailment.