SAN LEANDRO (KRON) — Police in San Leandro are investigating the discovery of a marijuana grow house following a residential fire.

On Thursday at 12:25 p.m., Alameda County firefighters responded to a residential fire in the 14700 block of Lark Street.

After the fire was extinguished, firefighters discovered an illegal marijuana grow operation inside the residence.

Detectives with the San Leandro Police Department initiated an investigation and recovered 240 plants in various rooms inside the house.

Police said the operation was capable of producing enough marijuana each year that could yield more than $144,000 in annual sales.

There are no reported arrest in the case.Bay City News contributed to this report.