SALT LAKE CITY — A federal judge has scheduled a three-day trial in September for a Utah electrician charged with starting a fire at an unfinished Salt Lake apartment building.

U.S. District Judge Ted Stewart on Thursday set a Sept. 8 trial for Dustin Bowman.

His attorneys immediately requested the trial be postponed. Stewart hasn't ruled on that request.

Bowman has pleaded not guilty to a federal arson charge from the Feb. 9 fire.

Prosecutors say the 34-year-old admitted to investigators he started the fire by igniting cardboard and tossing it into a bathtub leaning against a wood wall.

No one was inside or injured in the nighttime fire, which caused an estimated $6 million in damage. Flames from the 40-foot-tall building could be seen for miles and drew hundreds of onlookers.