ALEXANDRIA -- Two people died in a plane crash in a grassy field near Sky Manor Airport Sunday afternoon, police said.

The Federal Aviation Administration identified the plane as a Mooney M20 that crashed in a residential neighborhood about half a mile southwest of the runway at the small municipal airport.

"At 12:29 p.m. Hunterdon County 911 Dispatch Center received a call of an aircraft down," Hunterdon County Chief of Detectives John Kuczynski said. He also spoke at the scene of the crash; a video can be found here.

"The aircraft was apparently coming in for a landing and subsequently witnesses saw the aircraft go down," Kuczynski said.

Both the pilot and the passenger died at the scene of the crash, according to the Hunterdon County Prosecutor's Office. Neither victim was identified.

There was no damage to any property near Sky Manor and Oak Summit roads, where the plane was recovered, the prosecutor said.

The exact cause of the crash remains under investigation. The National Transportation Safety Board and the FAA will investigate the crash, the prosecutor said.

Alexia Hughes, a Bucks County, Pa. resident, said she was part of a large crowd watching planes take off and land outside the Sky Cafe restaurant at the airport. They saw a small plane try to land and come in too fast.

"Instead of aborting the landing, he continued to try to land and ran out of runway," she said.

The plane then pulled up, barely clearing trees at the end of the runway, Hughes said. It tilted up and to the left before losing lift and crashing.

Myles Ma may be reached at mma@njadvancemedia.com. Follow him on Twitter @MylesMaNJ. Find NJ.com on Facebook.