Federal investigators have determined that a United Airlines Boeing 767 was flying too slow and too low before striking a light pole during its approach to Newark Liberty International Airport last month.

The National Transportation Safety Board released its preliminary report on the May incident involving the United flight arriving from Italy. According to the NTSB, the aircraft's first officer had warned the captain that the plane was "slow and a little low" during the approach.

The jet struck a light pole on the New Jersey Turnpike during the landing sequence, causing damage to a truck on the highway below. The NTSB's preliminary findings indicate the captain was flying the aircraft at the time of the incident.

The preliminary report represents the initial phase of the NTSB's investigation into the incident. Federal investigators typically release more detailed findings and analysis as their investigation progresses, including examination of flight data recorders, cockpit voice recordings, and interviews with crew members.

No further details about potential injuries or the extent of damage to the aircraft were immediately available in the preliminary report. The NTSB continues to investigate the circumstances surrounding the May incident at one of the New York metropolitan area's busiest airports.