A body part apparently fell from the wheel well of a plane coming in for a landing on Tuesday at John F. Kennedy Airport (search) and landed in a suburban backyard, authorities said.

More remains were found on a South African Airways (search) flight after it landed at Kennedy, said Tony Ciavolella, a spokesman for the Port Authority of New York and New Jersey.

Police suspect the remains were that of a male stowaway, the spokesman said. He would not confirm that the incidents at the airport and Long Island were related, saying, "It's still under investigation."

Messages left with South African Airways were not immediately returned.

Police in Nassau County (search) received a call at 10:51 a.m. about a body part found in the backyard of a house. It apparently had hit the roof of a garage and bounced to the ground, said Officer Thomas Blanchard.

The South African Airways flight had originated in Johannesburg, but made one stop in Dakar, Senegal.