NEW YORK (CBSNewYork) -- Police say they are looking for three young males, one of whom opened fired Monday morning after getting into an altercation with a homeless man in Midtown.

According to a man who works in a coffee cart at Madison Avenue and East 45th Street, three teenagers approached him between 4:30 and 5 a.m. asking for souvlaki, but he told them he only had coffee and rolls.

One of the teens then went over to five homeless people sleeping in the vestibule of a Men's Wearhouse store and wanted them to move, the food cart worker told 1010 WINS' Juliet Papa.

"And the homeless were sleeping, and the teenager went inside," the man said. "So I don't know what happened. All of a sudden, they were fighting."

He said the suspects then ran north and one held a gun over his head backward and fired it. Police sources told CBS2 the gunman shot twice.

No one was hit. One shot hit a street sign.

"I wasn't scared," the witness said. "I thought it was fake or something until somebody found a bullet. Then I realized that it was real."

No arrests have been made.

The suspects were apparently intoxicated, CBS2's Steve Langford reported.