UPDATE (3:36 p.m. EST): New reports from Casper Police Chief Chris Walsh say that three people are dead after the attack. Two were found at a science center on the campus, and the building was evacuated. The third person was found at another location. 

At least one person was killed and another wounded Friday morning in an attack at Casper College, a central Wyoming community college, according to an Associated Press report.

Police took one injured person into custody after the attack that happened just before 9 a.m. at Casper College, according to school spokesman Rich Fujita. Authorities were searching the campus for any additional suspects.

The campus was locked down and students were advised to shelter in place until police gave the all-clear, AP reports.

Fujita said he had no additional information on how the attack happened, what weapons may have been used or who was killed.

According to professors at the college, the lockdown lasted approximately 30 minutes before students were sent home.

Casper College is a two-year community college in Wyoming’s second-largest city. Casper has a population of 56,000, and is located about 250 miles northwest of Denver.