FORT MCCOY, Wis. (CBS 58) -- Two Afghan refugees have been charged with crimes in unrelated cases while at Fort McCoy in Wisconsin, officials say.

A federal grand jury in the West District of Wisconsin returned the following indictments on Wednesday, Sept. 22:

Bahrullah Noori, 20, is charged with attempting to engage in a sexual act with a minor using force against that person, and with three counts of engaging in a sexual act with a minor, with one count alleging the use of force. Officials say the indictment alleges that the victims had not attained the age of 16 years and were at least four years younger than Noori.

Mohammad Haroon Imaad, 32, is also charged with assaulting his spouse by strangling and suffocating her on Sept. 7, officials say. 

Noori and Imaad were charged previously in complaints filed in U.S. District Court. The two made initial appearances in Madison on Sept. 16 and are being detained at the Dane County Jail. Officials say the two are scheduled for arraignment on Thursday, Sept. 23 at 9:30 a.m. and 10:15 a.m. 

If convicted, Noori faces a mandatory minimum penalty of 30 years and a maximum of life in federal prison on the charges alleging use of force, and a maximum penalty of 15 years on the other two charges, according to officials.

Imaad faces a maximum penalty of 10 years. 

Officials say investigations were done by the Federal Bureau of Investigation and the Fort McCoy Police Department.