Four people were killed and at least 16 others wounded on Wednesday when a gunman burst into a school cafeteria in Montreal, Canada, and began shooting in all directions before shooting himself. The gunman, who was dressed in military fatigues, stormed into Dawson College's cafeteria, said Devansh Smri Vastava. He said he heard about 20 shots and that teachers were running through the halls telling students to get out. A SWAT team and canine units were at the college, going floor by floor to look for victims, Sgt. Giuseppe Boccardi told CNN. "Most of the students have exited the college grounds," he said. Martine Millette of Montreal police said they did not know yet how many people have been shot at the college, which has about 3,000 students. "They are trying to locate the second or third suspect to see if there is one or none," Millette said. Additional details were not immediately provided. One student at the college told radio station 940 News that she saw two people who had been shot, including one who was hit in the neck. The student said a friend had told her four people had been shot. TV footage showed students fleeing the building.