SAN FRANCISCO (KRON) — Twenty-five people and three pets are displaced, and one firefighter is injured after a two-alarm fire broke out early Sunday morning in San Francisco’s Hayes neighborhood, according to San Francisco Fire Department.

Shortly before 2 a.m., a first-alarm fire was reported at a residence on Hayes Street. After it was later upgraded to a two-alarm fire, two other residences were affected, SFFD said.

The fire was under control shortly before 3 a.m. Twenty-five people are now displaced along with three pets, and one firefighter was injured but later deemed “okay,” officials said.

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Red Cross Northern California is helping those who were displaced. The cause of the fire is currently under investigation.