A fire broke out at a luxury hotel on the Las Vegas Strip on Saturday, injuring one person and covering the Strip with thick plumes of black smoke, fire officials and witnesses said.

The Clark County Fire Department said on Twitter that it was fighting a two-alarm fire at 3708 South Las Vegas Blvd., the address of the Cosmopolitan of Las Vegas. The gleaming luxury hotel overlooks the main part of the Strip and attracts megawatt celebrities like Beyoncé and Jay Z, who stay in its posh three-story suites and come and go through its secret entrances and passageways.

The fire department said that one person, who was not immediately identified, had been taken to the hospital. There was no immediate information on how seriously the person was injured.