An Internet weapons dealer who sold a gun to the Virginia Tech shooter also sold handgun accessories to Steven P. Kazmierczak, who killed five people and himself yesterday at Northern Illinois University, the Associated Press reported.

The company, TGSCOM Inc., is a major Web-based gun retailer in Green Bay, Wis. On one of its two Web sites, Topglock.com, it sold two empty handgun magazines and a holster to Mr. Kazmierczak for $105.62 on February 4. Both items were for a Glock, a type of gun that he carried during the shootings. The accessories were shipped on Monday, said Eric Thompson, a company official.

The Virginia Tech gunman, Seung-Hui Cho, used a handgun he purchased from TGSCOM’s other Web site in the massacre last April, in which he killed 32 people and himself.

Mr. Thompson said his dealership is well known among Internet gun shoppers, so it was not surprising that someone looking for Glock items would find it. But he said he was shocked to be tied to both shootings.

“I’m shaking,” Mr. Thompson told the AP. “I can’t believe somebody would order from us again and do this.” —Paul Fain