Boulder Police are investigating a report of an attack with multiple victims Sunday afternoon. Miri Kornfeld, an organizer with Run For Their Lives, which holds weekly walks to raise awareness of Israeli hostages, told 9NEWS the group was walking on Pearl Street on Sunday afternoon. When they arrived at the historic courthouse in the area of 13th and Pearl streets, a man was waiting there with bottles, Kornfeld said. He threw the bottles, and five people were burned, including one woman who was badly burned and had to roll on the ground to put the fire out, she said. The victims were taken to the hospital. Kornfeld said it appeared the perpetrator had been detained. As of 3:30 p.m., police had evacuated the area bordered by Broadway to the west, Pine Street to the north, 16th Street to the east and Walnut Street to the south. More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news X: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.