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.
Fire trucks responding to the scene prompted detours along both 17th and Walnut Streets.
This is a developing story. Check back for updates.