By James Pearson, Alina Selyukh and Matt Spetalnick SEOUL/WASHINGTON (Reuters) - Three American citizens detained in North Korea appealed on Monday to the U.S government for help returning home, speaking in rare interviews that were set up by the North Korean government and may signal an attempt by Pyongyang to reopen a long-stalled dialogue. One of them said his health was failing and another described his situation as "urgent." The three men said they were being treated humanely but asked the U.S. Responding to the interviews, the U.S. "Out of humanitarian concern for Jeffrey Fowle, Matthew Miller, and their families, we request the DPRK release them so they may return home," State Department spokeswoman Jen Psaki said in a statement, using the formal acronym for North Korea, and referring to the two men awaiting trial.