SALT LAKE CITY -- A regional jet bound for Chicago was evacuated after the pilot reported smoke in the cockpit.

United Flight 6184 was about to take off from Salt Lake City International Airport around 11 a.m. Tuesday when the pilot reported smoke during the taxi to the runway. It was unclear whether the pilot saw smoke or smelled it.

Airport spokeswoman Barbara Gann says the plane immediately returned to the gate and all 60 passengers and six crew members left the plane safely.

A message left for United on Tuesday was not immediately returned.