Two Illinois brothers remain jailed without bond after being charged with killing two restaurant workers in a shooting authorities say they admitted.

Anthony Akins Jr., 20, and Oundr'e Akins, 19, are charged with robbing a Steak 'n Shake restaurant in south St. Louis County, where they worked six months ago, and killing two employees.

The victims, 44-year-old waitress Tammy Cantrell, and 24-year-old cook Mark Gerstner, were found dead early Monday.

A police affidavit says the Akins brothers admitted to the shootings and robbery.

St. Louis County Prosecutor Robert McCulloch says Anthony Akins, housed in the St. Louis County jail, may appear in court Friday. Oundr'e Akins is jailed in St. Clair County, Ill., but is expected to be brought to Missouri.