Authorities served a search warrant Thursday at a Kearny Mesa commercial building where a possible illegal drug lab was operating.
The San Diego Police Department Narcotics Unit recently received information about the alleged hash-oil manufacturing activity in the 8200 block of Engineer Road, according to SDPD public affairs.
Hazardous-materials personnel were called in to make sure the structure was safe for detectives to enter, police said.
At least two people were detained at the site for questioning, authorities said.
