Law enforcement officials have arrested three people and expect to arrest more at two Mountain View apartment complexes where police say they have found a drug lab, drugs and guns.

Mountain View police said that police officers from Mountain View and Sunnyvale joined forces with a Los Altos SWAT team, members of the state Department of Justice and the Santa Clara County Specialized Enforcement Team to serve search warrants at four apartments in two complexes located at 242 and 228 Bush St.

So far, law enforcement officers had found heroin, methamphetamine, marijuana, an assault rifle, shotguns, other weapons and a Dimethyltryptamine (DMT) lab, police said.

Police had arrested three people as of 5 p.m. and expect to make more arrests in the case.

Mountain View police Sgt. Sean Thompson said that to his knowledge, this kind of drug lab was a rare find for police.

"We're still doing research but we believe this will be the third DMT lab busted in state and only the first one busted in the Bay Area," Thompson said. "They're still searching and they'll be out there well into the night."

Police said that authorities will also be working to clear hazardous materials from the DMT lab. DMT is classified as a Schedule I substance by the federal government and is a hallucinogen that naturally occurs in plants and can also be synthesized in a lab.