Firefighters investigate fire at central Fresno apartment building

FRESNO, Calif. (KFSN) -- Fire crews are working to determine what sparked a fire at an apartment complex in central Fresno.

Firefighters were called to the building on Glenn and Belmont Avenues after 10 pm on Sunday.

Crews used a ladder truck to access the top of the building to put out the flames.

The cause of the fire is under investigation. It wasn't immediately clear if any residents were hurt.

This is a developing story.