In the United States, the father of the gunman who killed nine people last week at Umpqua Community College in Oregon has criticized U.S. gun policies, which allowed his son to amass an arsenal of weapons. Ian Mercer, father of Chris Harper-Mercer, made the comments in an interview with CNN.

Ian Mercer: “The question that I would like to ask is: How on Earth could he compile 13 guns? How can that happen? You know, they talk about gun laws, they talk about gun control. Every time something like this happens, they talk about it, and nothing is done. I’m not trying to say that that’s to blame for what happened, but if Chris had not been able to get a hold of 13 guns, it wouldn’t have happened.”

An autopsy has confirmed Chris Harper-Mercer killed himself, after killing eight of his classmates and a professor. Meanwhile, in Northern California four high school students have been arrested as part of what authorities are calling a highly detailed mass shooting plot at their high school. No weapons have been found.