SIDNEY, Neb. (AP) — Officials in western Nebraska say two people have been arrested in Sidney, accused of delivering methamphetamine through the mail.

A 49-year-old man and 35-year-old woman were arrested Friday morning. Cheyenne County Attorney Paul Schaub says they are accused of being involved in a scheme where meth was delivered through the mail. Schaub says authorities have seized about four ounces of the drug.

Charges against the pair did not appear in online court records Friday afternoon.

Schaub says more arrests are expected. The arrests are the result of a joint investigation by the Sidney Police Department, Cheyenne County Sheriff’s Office, Nebraska State Patrol, Western Nebraska Intelligence Narcotics Group and the U.S. Postal Service.