LOS ANGELES - Firefighters in the US city of Los Angeles continued efforts overnight and into Sunday to contain a fire at a large industrial building in the city, the Los Angeles Fire Department (LAFD) said.

The fire broke out at a large warehouse in the Boyle Heights area of Los Angeles on Wednesday, generating heavy smoke that has spread across parts of the metropolitan area for several days.

Los Angeles Mayor Karen Bass on Saturday declared a local emergency in response to the incident.

According to the latest update from the LAFD on Sunday, crews have successfully confined the fire to one side of the building.

Firefighters removed sections of the exterior wall overnight to improve access and allow water to reach areas that had been difficult to extinguish.