Officials say three people are dead after a small plane broke up mid-flight, scattering debris across a residential Long Island neighborhood.

National Transportation Safety Board investigator Robert Gretz says the pilot of the Beech BE-35 aircraft reported an issue with his instrument panel before the plane went down in Syosset Tuesday afternoon.

Gretz says two men and a woman on board were killed. He says investigators are still collecting pieces of the plane. The debris field stretches about two miles.

The Federal Aviation Administration says the plane took off from Myrtle Beach, South Carolina, and was headed to Robertson Field, an airport in Plainville, Connecticut.

Investigators are still trying to determine what caused the aircraft to break up.

Berry Hill Elementary School and one other school went into lockdown after the crash, according to Thomas Rogers, superintendent of the Syosset Central School District. Rogers said that an ‘an unusual noise’ heard at the school prompted him to tell parents to stay away from the campus, according to the Wall Street Journal.