Credit: State Farm/Flickr

HUMBOLDT PARK — At least 20 people were displaced and three people were injured, including one firefighter, in an extra-alarm Humboldt Park fire early Friday.

Just after 3 a.m., firefighters responded to an apartment building fire at 3226 W. Augusta Boulevard, according to Chicago Fire Department officials.

The fire started on the three-flat’s wooden back porch and spread to two buildings on either side, according to Chicago Fire Department spokesman Larry Langford.

“Not a huge amount of fire inside,” Langford said. “Most of it was outside with some extension to the inside. Of course, there was a lot of smoke damage and water damager inside.”

Langford said the cause of the fire is unknown and still under investigation.

Two residents who suffered from smoke inhalation were sent to Norwegian Hospital. One firefighter was also sent to the hospital with minor injuries.

Other media outlets are reporting that a dog was killed in the fire, but Langford could not confirm that information.

At least 20 people were displaced after being evacuated by the fire, but that number could fluctuate, according to Langford.

Logan Square, Humboldt Park & Avondale reporterrnrnmina@blockclubchi.orgnnLogan Square, Humboldt Park & Avondale Twitter @mina_bloom_