Smoke filled the 11th floor of the Latham Hotel in a busy section of Philadelphia's Rittenhouse Square neighborhood Thursday night prompting evacuations.
Firefighters were called to the hotel at 17th and Walnut Streets around 8 p.m., fire officials said.
Crews found smoke on the upper floor, but had not said what was causing it.
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Fire trucks responding to the scene prompted detours along both 17th and Walnut Streets.
This is a developing story. Check back for updates.