A 13-year-old boy who previously lived on Long Island is showing signs of life after being declared brain dead following a weekend crash in New Jersey, the family said Tuesday.

Michael LaVecchia III remains hospitalized and family members continue to hold vigil at his bedside, said the boy's grandfather, Michael LaVecchia Sr. of Central Islip.

"His mother saw him moving his head and his toe and his arm, and he moved his head left and right," he said. "Even his doctor said, 'I've never seen this before,' . . . so that gave us hope."

The teen has been transferred from a Paterson, New Jersey, hospital to a Level One trauma center, he said.

The boy was a passenger in a sport utility vehicle being driven Saturday by his father, Michael LaVecchia, 37, who recently moved from Brentwood to East Stroudsburg, Pennsylvania.

Police said LaVecchia was driving east on Route 80 near Wayne, New Jersey at about 8 a.m. when his vehicle left the road and struck a dump truck parked on the shoulder.

The father was pronounced dead at the scene, New Jersey State Police said. Another passenger, Giovanni Laboy, 14, of Centereach, died later that day at a hospital.

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New Jersey State Police said previously that Michael LaVecchia III died at 11:55 a.m. Sunday. A police spokesman could not be reached Tuesday.

A funeral Mass for the father is scheduled for Thursday in Central Islip, the family told the news website NJ.com.