The fire at the Waterford in Kensington, Md., blocked roads in that area. (Montgomery County Fire Department)

A three-alarm fire broke out early Tuesday at a high-rise condo building in Kensington, Md., officials said.

The fire that began around 5:15 a.m. at the Waterford on University Boulevard near Connecticut Avenue blocked roads in that area throughout the morning rush hour.

Pete Piringer, a spokesman for the Montgomery County Fire Department, said the fire was on the ninth floor in a bedroom and the building was evacuated. More than 100 firefighters were on the scene, and they encountered “very heavy smoke conditions,” according to Piringer.

Two civilians and one firefighter were taken to a hospital. All had injuries that were not life-threatening, Piringer said.

Officials said the cause of the fire is still under investigation, but Piringer said in a tweet that initial results indicated that it was likely related to a “candle/incense or electrical” issue and started in a bedroom. Piringer said the apartment had a “large amount of household clutter but not to [the] level of hoarding.”

A resident noticed the fire and went into the main hallway, he said, hit the fire alarm and tried to use a fire extinguisher.

The building does not have sprinklers throughout the property. About 15 units were impacted by the blaze.