Montreal Canadiens head coach Martin St. Louis spoke out after his son Ryan was on campus during the deadly shooting at Brown University on Saturday, December 13. "He was sheltering during last night's game," Martin, 50, told reporters on Sunday, December 14, after Montreal's 4-1 win over the Edmonton Oilers. "It's a tragedy. It hits home. I want to send my thoughts and prayers to everybody involved - the students, their families, that community. Stuff like that shouldn't happen." Ryan, a 22-year-old senior on the Brown hockey team, took cover during the shooting at the Ivy League school on Saturday, the same night the Canadiens faced the New York Rangers at Madison Square Garden. "He's safe, he's back home," Martin said of his son. "It was a difficult time for everyone, so my thoughts go out to Brown and the community." 'Heated Rivalry' Drew Inspiration From a Relationship Between 2 NHL Stars Martin and his wife, Heather, also share sons Lucas, 20, and Mason, 17. Two students - Ella Cook and Mukhammad Aziz Umurzokov - were killed and nine were injured when an individual entered a lecture hall and began shooting with a rifle. One of the injured students remains in critical condition as of Monday, December 15. A person of interest who had been detained by authorities was released on Sunday, and the search for the shooter remains ongoing. Late Sunday night, Brown University - which is located in Providence, Rhode Island - issued a statement about the person of interest being released. "As Providence police continue to lead this investigation, they have informed Brown that they are continuing their search efforts, which includes ongoing coordination with multiple agencies," the statement said. "There continues to be a heightened amount of local, state and federal police activity in the area as law enforcement continues to investigate and patrol with increased vigilance. The Department of Public Safety has more than doubled its staffing." The statement continued, "We know that this update may prompt numerous questions. This remains an active police investigation, and the University must defer to the Providence Police Department to release information as they deem appropriate." Providence Police Department major David Lapatin spoke to CNN on Monday, saying, "We have a lot of leads." "We're continuing with a plan," Lapatin continued. "We're hitting the streets. We're on it. We're collecting evidence now, seeing if it will lead to a possible arrest." Brady Tkachuk Says He and Matthew Wouldn't Have 'Chance' in Fight With Kelces In a statement on Sunday, Brown University provost Francis Doyle III announced the school had canceled all remaining exams, classes, papers and projects for the fall semester. "This choice was made out of our profound concern for all students, faculty and staff on our campus," Doyle said. "In the immediate aftermath of these devastating events, we recognize that learning and assessment are significantly hindered in the short term and that many students and others will wish to depart campus. Students are free to leave if they are able." Doyle continued, "At this time, it is essential that we focus our efforts on providing care and support to the members of our community as we grapple with the sorrow, fear and anxiety that is impacting all of us right now. University leaders are committed to providing care and mobilizing resources to assist our community members through this difficult time." Brown's hockey team is scheduled to return on the ice on December 28 when they travel to play Princeton.