MANHATTAN — Emergency crews responded to Grand Central Tuesday afternoon as fire burned inside a restaurant's duct work, sending dark smoke billowing above the transit hub, fire officials said.

The call came in about 2 p.m., FDNY said. Witnesses reported seeing heavy smoke pouring from the terminal's roof.

An MTA spokesman said the smoke came from Junior's, located in the basement food court of the terminal. FDNY said the smoke was caused by fire in the restaurant's duct work.

According to the FDNY, a fire suppression system went off in the kitchen, sending water into the restaurant.

By 2:30 p.m., the fire appeared to be extinguished and an acrid smell of burned food lingered, a witness told PIX11 News. Large puddles of water covered the floor of the food court and the restaurant appeared to be cordoned off by emergency tape.

Patrons in the restaurant were evacuated. There were no evacuations from the actual terminal.

No one was hurt, fire officials said.

The MTA says the smoke condition did not impact train service.

Greg Mocker contributed to this report.