Wichita ? Four people in Kansas — including a former Butler County Community College student and two students at Pittsburg State University — have been arrested on charges in a $1 million scam involving stolen credit card numbers and the Nigerian black market.

The scam involving former Butler student Ikemefuna Iwunoh, 19, of Wichita has connections in other Midwestern cities, investigators said.

“There might have been 20 people in other cities doing the exact same thing,” said Tom Pappas of the Wichita Postal Inspection Service.

In Pittsburg, federal officials arrested three people from Nigeria on Thursday as part of an investigation into the Internet credit card-fraud scheme, a spokesman for the U.S. Secret Service said.

U.S Atty. Eric Melgren identified the three as Itobore Oshobe, 24; Ote Kadana, 23; and Andrew Ikepeme, 19. They were charged Friday with using unauthorized credit cards with the intent to defraud, Melgren said.

For months, a large number of packages were arriving at Iwunoh’s basement apartment in east Wichita, investigators said. Some days, 40 boxes containing computers, printers, shoes and clothing were delivered to his door.

Authorities allege Iwunoh was part of a group of Nigerians hacking into computer systems to steal credit card numbers from across the country. He was arrested last weekend and is in the custody of federal immigration authorities.

The credit cards were used to order merchandise that was delivered to his Wichita apartment. Those items were sent to New York, where cohorts sent them to Nigeria to resell on the black market, Pappas said.

“They can basically get a 100 percent markup doing that,” Pappas said. “Keep in mind, they never paid for it in the first place, so it’s pretty lucrative.”

Investigators estimate people working from the Wichita apartment were responsible for about $100,000 in fraudulent charges since August.

Iwunoh, who also used the first name Anderson, was in the country on a student visa, but records show he is not currently taking classes at Butler County Community College.

He last was enrolled there last spring but did not finish the semester, according to the registrar’s office.