ALAMEDA -- A firefighter was injured early Tuesday morning after a blaze caused an estimated $1 million in damage to a three-story building and its contents on Park Street, fire officials said.

The Alameda firefighter suffered a shoulder injury during the blaze that damaged six apartments, two businesses and displaced at least a half-dozen residents. He was treated at the scene and is resting at home, said Capt. Jim Colburn.

No other injuries were reported.

Crews were called at 2:37 a.m. to the building at 1203 Park St., said Colburn. When firefighters arrived, the second and third floors of the building were engulfed in flames, Colburn said.

Alameda fire investigators begin picking through debris to determine the cause of a two-alarm fire on Park Street and San Jose Avenue in Alameda, Calif.,
Alameda fire investigators begin picking through debris to determine the cause of a two-alarm fire on Park Street and San Jose Avenue in Alameda, Calif., early Tuesday, March 26, 2013. (Laura A. Oda/Staff)

Firefighters had the blaze under control about 4:27 a.m., Colburn said, and the Red Cross assisted at least six displaced residents with temporary housing.

A preliminary investigation revealed the blaze broke out in an apartment on the second floor of the three-story building, Colburn said. The cause remains under investigation.

Colburn said the two businesses located on the first floor of the building -- Aphrodite's Closet and iSalon -- sustained heavy water damage and it appears most of the apartments above the two businesses were destroyed.

"The entire third floor is destroyed," Colburn said.

Photographer Laura Oda contributed to this report. Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.