Four people are in custody following an early morning police raid on protesters occupying land owned by the University of California in the San Francisco Bay area city of Albany.
UC Berkley spokeswoman Claire Holmes says three men were arrested on suspicion of trespassing and interfering with police department operations on Monday after officers warned protesters to leave the so-called Gill Tract.
UC Police Lt. Eric Tejada says a woman also arrested on Monday also faces trespassing charges.
All four names have yet to be released.
Protesters occupied the land two days earlier and spent the weekend pulling weeds and planting crops. They want to convert the land into an urban farm.
UC officials say the land is used for agricultural research and there are plans to develop a grocery store and senior housing there.
Protesters occupied adjacent land for weeks last year before police removed them.