PHOENIX — The U.S. Attorney’s Office says a federal grand jury has returned an indictment charging three African refugees with attempting to take a simulated explosive device through Phoenix Sky Harbor International Airport.

Luwiza Laku Daman, Shullu Anguwi Gorado, and Asa Shani are scheduled to appear in federal court Friday afternoon in Phoenix for a bail hearing. All three are from Eritrea, a country on the Red Sea.

Authorities say Daman was carrying the suspicious item in her bag on Aug. 5 as she went through security at Sky Harbor intending to board a plane to Des Moines, Iowa. Police say Gorado and Shani gave it to her.