MADISON, Wisconsin (AP):

The online gun dealer who sold a weapon to the Virginia Tech shooter said it was an unnerving coincidence that he also sold handgun accessories to the man who killed five students at Northern Illinois University.

Eric Thompson said his website, www.topglock.com, sold two empty 9mm Glock magazines and a Glock holster to Steven Kazmierczak on February 4, just 10 days before the 27-year-old opened fire in a classroom and killed five before committing suicide.

Another website run by Thompson's company, www.the gunstore.com, also sold a Walther .22-calibre handgun to Seung-Hui Cho, who killed 32 people in April on the Virginia Tech campus before killing himself.

"I'm still blown away by the coincidences," Thompson said Friday. "I'm shaking. I can't believe somebody would order from us again and do this."