Firefighters responded to a blaze at a St. Paul apartment building Saturday that left 17 units condemned and 30 people displaced.

Firefighters said in a news release that they went to the 1300 block of St. Paul Avenue around 4:20 p.m. after getting reports of a grass fire that spread to a nearby apartment building.

Arriving crews then saw flames had engulfed trees that were against the apartment building as well as attic space above the third-floor apartments.

The building was evacuated and fire crews extinguished the flames without any injuries being reported by firefighters or civilians, the news releases states.

The St. Paul Fire Department said all crews were at the scene for more than five hours and that 20 mph winds combined with dry weather conditions contributed to the fire spreading so quickly.

Fire investigators report they found firework debris found near the origin of the fire and that residents reported hearing fireworks just before they saw flames in the grass.

Police and firefighters say they are still investigating the cause of the fire.

Overall structure and content damage is estimated at more than $2 million, according to the news release.

The Red Cross released a statement saying “Our volunteers are responding to help more than 30 people displaced by the multi-unit apartment fire on Saturday in St. Paul. Shelter, food and other immediate needs, such as health and emotional support, are our focus. Our volunteers will also work with those affected to assess individual needs.”