Nassau police have deployed a helicopter and officers on the ground, some with dogs, to search for a Massapequa Park man who apparently went out for a run Monday morning and never returned.

Michael Adragna, 27, of First Avenue, was last seen by a neighbor near his home -- which is close to the Massapequa Preserve -- about 6:15 a.m. Monday, police said Wednesday.

The department's missing persons detectives are investigating, Det. Vincent Garcia, a police spokesman, said.

"We do have officers, K-9 and aviation up over the preserve looking. If anyone knows him, hears from him, let us know," Garcia said. He said Adragna is "known to run through" the preserve.

Adragna's father, Michael J. Adragna, 51, of Lake Grove, said "it's completely out of character" for his son to not come home or contact any of his friends. The family set up a Facebook page and organized their own searches of the preserve, the father said.

He said his son's cellphone, wallet, and keys were left inside the home he shares with his paternal grandmother. His car -- a blue Toyota Camry -- is still parked outside, the father said.

Adragna said his son, who works as a salesman for a Verizon subcontractor, ate dinner Sunday night at home with his grandmother, who hasn't seen him since.

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"Somebody from across the street said they saw him in running clothes," said the father, who works as a transportation supervisor at Newsday. "He went out for a run on Monday morning at 6:30 and hasn't been seen since."

When he spoke to his son Sunday afternoon, he said he had a cold and was going running in hopes of remedying it, the father said. "He's been working seven days a week, like an animal. He said he wasn't going to work, so he was going to run and break the congestion out of his lungs," the father said.

In a Crime Stoppers bulletin released by police, Adragna is described as 5-foot-11, 180 pounds, with brown eyes, a bald head and a beard. He has a spider tattoo on his right forearm, his father said.

Anyone with information can call 800-244-8477 or the Nassau County Missing Persons Section at 516-573-7347.