Investigators look at the remains of a small plane along Main St, Wednesday, Oct. 12, 2016, in East Hartford, Conn., a day following the plane's crash. The FBI is taking over as lead investigator in the deadly crash of a small plane carrying a flight instructor and a student pilot because of indications that it might have been a criminal act, safety officials said Wednesday. (AP Photo/Jessica Hill)
Investigators look at the remains of a small plane along Main St, Wednesday, Oct. 12, 2016, in East Hartford, Conn., a day following the plane's crash. The FBI is taking over as lead investigator in the deadly crash of a small plane carrying a flight instructor and a student pilot because of indications that it might have been a criminal act, safety officials said Wednesday. (AP Photo/Jessica Hill) Credit: Jessica Hill

A flight instructor and a student pilot had an altercation inside the cockpit of a small plane and the instructor was unable to regain control from the trainee before it crashed near the Connecticut headquarters of a military jet engine manufacturer, killing the student, a U.S. official familiar with the investigation said Wednesday.

The crash appeared to have been a suicide attempt by the student and terrorism was ruled out, the official told the Association Press. The official, who wasnโ€™t authorized to speak publicly, spoke on condition of anonymity.

The Piper PA-34 Seneca crashed with the two men aboard during a training flight Tuesday in East Hartford, Conn., near the headquarters of Pratt & Whitney, while returning to Brainard Airport in Hartford, authorities said. The flight instructor was badly burned but survived.

The instructor described the student pilot as disgruntled about learning to be a pilot, the U.S. official said.

The flight instructor is Arian Prevalla, 43, and the student was Feras Freitekh, said a law enforcement official, who wasnโ€™t authorized to disclose the information and spoke to the AP on condition of anonymity.

Prevallaโ€™s social media pages indicate he is president of the American Flight Academy and a managing member of the Hartford Jet Center, both based in Hartford, Conn. The pages say he originally is from Albania and now lives in Hartford. On LinkedIn, Prevalla said he received a bachelorโ€™s degree in Aviation Science from Mountain State University, a now-defunct university in Beckley, W.Va.

Freitekh lived in the Chicago suburb of Orland Hills since 2013 and received a private pilot certificate last year from the Federal Aviation Administration, according to public records.

Safety officials said Wednesday that the FBI was taking over as lead investigator of the crash because of indications that it was an intentional act.

The National Transportation Safety Board said Wednesday that its initial investigation indicated the wreck was deliberate. An agency spokesman, Terry Williams, said he couldnโ€™t elaborate on the basis of that finding.

The survivor told police detectives it was not an accident, according to East Hartford Mayor Marcia Leclerc.

โ€œItโ€™s troubling,โ€ Leclerc said. โ€œBut I also know that stories change and information can be skewed. Weโ€™re waiting for the facts to come out.โ€

Authorities said the student and instructor were about to land at Brainard Airport in Hartford when the plane struck a utility pole and crashed onto the road about 4 p.m. Tuesday, bursting into flames. The crash site is a short distance from the airport, across the Connecticut River and in line with the runway.

โ€œThe path that the plane took could have been much worse. So weโ€™re very fortunate in that sense,โ€ East Hartford police Chief Scott Sansom said.

The police chief initially asked the FBI to assist in the investigation because it happened so close to Pratt & Whitney. The company said its operations werenโ€™t affected by the crash and none of its employees were involved.

Police say Prevalla is hospitalized with serious burns and is expected to live.