North Korea announced that it will put two American tourists, Matthew Todd Miller and Jeffrey Edward Fowle, on trial for carrying out "hostile acts against the country," according to Fox News.

The two American tourists were reportedly detained nearly three weeks apart from each other in April.

North Korean authorities have yet to specify what Miller and Fowle did or when the trial would begin for the two U.S. citizens.

"Their hostile acts were confirmed by evidence and their own testimonies," stated North Korea's official KCNA news agency, according to Reuters.

Diplomatic sources have stated the Fowle was detained for leaving the Bible in his hotel room. However, a spokeswoman for Fowle's family said the 56-year-old man from Ohio was not on a mission from his church.

Fowle had arrived in the country on April 29 and was being investigated in June for reportedly committing acts inconsistent with the purpose of a tourist visit.

24-year-old Miller was detained after entering the country on April 10 with a tourist visa, then proceeding to tearing it up at the airport and shouting that he wanted to seek asylum.

"Out of humanitarian concern for Mr. Fowle and Mr. Miller and their families, we request North Korea release them so they may return home," U.S. State Department spokeswoman Jen Psaki told reporters.

After Miller was detained by North Korean authorities, Washington updated its travel warning to the North to specify that over the past 18 months, "North Korea detained several U.S. citizens who were part of organized tours. Do not assume that joining a group tour or use of a tour guide will prevent your arrest or detention by North Korean authorities."