BERKELEY (CBS / AP) — University of California, Berkeley officials said they’re prepared to take legal action if Occupy activists refuse to leave school-owned land where they have pitched tents and planted crops.

In a letter Tuesday, UC Berkeley administrators said they are evaluating civil and criminal legal actions to evict a group called Occupy the Farm from a 10-acre parcel in Albany.

READ MORE: Hundreds of Kaiser Mental Health Clinicians Demand Better Care For People Of Color

The campus response comes a day after the activists said they would only leave if the university gives them continued access to the Gill Tract and meet other demands.

READ MORE: Thieves Target License Plates in San Francisco; Rack Up Parking Tickets

About 200 Occupy squatters broke into the property on April 22 to protest planned housing and commercial development nearby. The protesters want the land preserved as an urban farm.

Berkeley officials say university research on the tract must resume by mid-May.

MORE NEWS: Warriors Distance Themselves From Minority Investor's Controversial Comments On Uyghurs Struggles In China

(Copyright 2012 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)