(AP) — Two Ukrainian men suspected of involvement in a major cybercrime operation that used computer malware to steal millions of dollars have pleaded not guilty in federal court in Lincoln, Neb.

The U.S. Department of Justice said Friday that 31-year-old Yuriy Konovalenko and 36-year-old Yevhen Kulibaba are among nine people charged by a federal grand jury in August 2012 with racketeering activity, conspiracy to commit computer fraud, identity theft and other counts. The indictments were unsealed Friday in U.S. District Court in Lincoln.

The Justice Department says Konovalenko and Kulibaba were recently extradited from the United Kingdom. The men pleaded not guilty Friday afternoon. Another hearing was set for June 2.

Officials say victims included a Nebraska bank and others in at least four other states: Kentucky, Iowa, Illinois and Massachusetts.