LOS ANGELES - Federal drug agents raided nearly a dozen medical marijuana clinics in California, seizing several thousand pounds of processed marijuana, along with weapons and money, authorities said.

Several people were detained, although no arrests were made after five dispensaries in West Hollywood and six others in Venice, Hollywood and the San Fernando Valley were searched Wednesday, said Sarah Pullen, a spokeswoman with the U.S. Drug Enforcement Administration.

The raids highlighted a conflict between a California state law and the federal drug agency.

California voters in 1996 approved the Compassionate Use Act, which makes marijuana available by prescription for medicinal uses. The DEA, which does not recognize California laws legalizing medical marijuana use, has recently increased its enforcement.

Under seal

Pullen declined to provide details of the latest investigation, saying the search warrants remained under seal.

"But obviously we are looking for marijuana and other illegal drugs, marijuana edibles and evidence of ongoing criminal activity and anything from paperwork to documents �?you name it," Pullen said.

City officials in West Hollywood said they were surprised by the action, learning of the raid as it was happening. City spokeswoman Helen Goss said West Hollywood has a "long-standing commitment" to the use of medical marijuana for people suffering from illnesses like HIV and AIDS.

Agents in bulletproof vests, gloves and face masks left a West Hollywood storefront with boxes and trash bags filled, as about 50 protesters booed and shouted "states' rights."

At one dispensary, The Farmacy on Santa Monica Boulevard, amateur videographers and others mobbed officers filling three cars with evidence.

"Today's enforcement operations show that these establishments are nothing more than drug-trafficking organizations bringing criminal activities to our neighborhoods and drugs near our children and schools," said Ralph W. Partridge, head of the DEA in Los Angeles.

Is it legal for federal enforcement to over-ride a state law?