Officials say four firefighters have been hurt battling an early morning blaze at a historic restaurant in Allentown, Pennsylvania.

Fire at Youell's Oyster House in Allentown
Fire at Youell's Oyster House in Allentown (WFMZ TV)
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Dispatchers say the fire broke out at Youell's Oyster House around 4 a.m. Tuesday and that the blaze was fully involved when firefighters arrived at the scene.

Assistant Fire Chief Lee Laubach says two firefighters have suffered burns and two others were hurt trying to get off a roof. Information on their conditions hasn't been released. He says firefighters had the blaze "pretty much under control" by 7:30 a.m.

The restaurant has been in operation since 1905 and the Allentown location opened in 1992.

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