Yesterday was a tough day for California.

A shooting spree at a tiny religious college in Oakland left seven people dead and three wounded, the Associated Press reports.

Law enforcement officers leave Oikos University following a school shooting Monday. (Noah Berger/AP)

“This was a calculated, cold-blooded execution,” Oakland Police Chief Howard Jordan told CNN. Police are expected to file charges Wednesday.

More of your morning links below:

Oaksterdam University

Federal agents raided Oakland’s “pot university”. On Monday, agents from the Internal Revenue Service, the U.S. Marshals Service and the Drug Enforcement Administration arrived with a search warrant for Oaksterdam University as part of an ongoing investigation into the school. Some students blocked the law enforcement vehicles while others shouted, “Shame!” and “DEA go away!”(Associated Press/Sacramento Bee)

California’s four U.S. attorneys announced in the fall that they planned to prosecute medical marijuana businesses that may be operating for-profit. These businesses, the attorneys said, are in violation of the 1996 state ballot measure that legalized medical marijuana in the state. (LA Times)

Occupy San Francisco

Police arrested nearly 80 Occupy San Francisco protesters. The activists attempted to take over an empty San Francisco building the night before. On Monday, police stormed the building in riot gear, tearing down a barricade. (SFGate)

Protesters said the building had been empty for five years, and they planed to use it as a center for health services and education. But the Catholic Archdiocese of San Francisco, which owns the building, said the building had been used as recently as 18 months ago for art and music classes. (LA Times)