Firefighters engage Third Alarm fire in Arcadia

Firefighters were engaged with a Third Alarm in Arcadia late Saturday evening. 

The fire was first reported at around 9:55 p.m. on 1st Avenue and Santa Clara Street at a commercial building. 

Large plumes of smoke and flames could be seen escaping from the roof of the structure. 

The cause of the fire was not known. 

This is a developing story. Check back for details.