Investigators on Tuesday will continue looking for clues into a small plane crash that killed five at a New Jersey airport.

The crash happened at Monmouth Executive Airport in Wall Township Monday afternoon. A mother and daughter who were sleigh riding in the area reportedly came across the debris and alerted authorities around 3:45 p.m.

Officials say the twin-engine craft was preparing to land when it broke apart and nose-dived into a snowy field near a runway. Debris was scattered over a 200-foot stretch.

Wall Township police released the identities of the victims late Tuesday. Of those killed were 38-year-old Andrzej Zajaczkowski of Warsaw, his 14-year-old son, Patryk, and his 6-year-old nephew, Filip Zajaczkowski, authorities said. The three males were family friends of the plane's owner Jacek Mazurek, 45, of Kearny, who was also killed along with the pilot, 46-year-old Wojciech G. Nykaza of Lodi.

According to police, the parents of the 6-year-old victim were at the airport waiting for the plane to arrive.

Federal Aviation Administration spokesman Jim Peters described the aircraft as a Cessna 337 Skymaster. Peters said the National Transportation Safety Board would be the lead agency in the probe into the cause of the crash.

Officials said Tuesday that it might take more than a year to determine the cause of the fatal crash.

According to reports, a witness claimed to have seen the plane attempt to land when something - possibly the tail of the aircraft - fell off. The plane then veered to the right and nose-dived into a snowy field along the runway of the airport.

Monmouth Executive Airport is located about 35 miles east of Trenton.