NEW HAVEN, Conn. (AP) — A track inspection found problems two days before a train derailed in the state and injured more than 70 people, the National Transportation Safety Board said Wednesday.

The May 15 inspection found a rail joint with inadequate supporting ballast and indications of vertical movement of the track near the point of derailment, the NTSB said. The agency, which has been investigating the crash, said rail sections were shipped to a lab for further examination.