Transcript for Trump raises hopes 3 US hostages being held in North Korea may be home soon

Next, this evening on the eve of that possible summit between president trump and North Korea's Kim Jong-un, the fate of three U.S. Hostages are in the news tonight. President trump raising hopes that North Korea will release them soon, tweeting, "Stay tuned." But tonight here, no official word that they're about to come home, and here's ABC's chief global affairs correspondent Martha Raddatz. Reporter: Anticipation that the three remaining American hostages would be released imminently, as president trump is preparing to meet with Kim Jong-un, fueled by the president's new lawyer, just this morning. We got Kim Jong-un impressed enough to be releasing three prisoners today. Reporter: And president trump tweeting, "The past administration has long been asking for three hostages to be released from a north Korean labor camp, but to no avail. Stay tuned." But only one of the detainees was taken under Obama, the other two American citizens who were both teaching in Pyongyang, were arrested just last year. We try to focus on, maybe today he's going to be released. Reporter: The state department would not confirm anything about the release of the prisoners, but a local activist is reporting that the men have been moved from a labor camp to a medical facility. It was just last year that a severely brain damaged Otto Warmbier died six days after he arrived home. His parents filing a wrongful death suit, accusing North Korea of torturing their son. Let's bring in Martha Raddatz tonight from Washington. I want to get back to what Rudy Giuliani said about the hostages being released today. Sarah Sanders at the white house was asked today why the president's lawyer was talking about the release if he's involved in these negotiations. Reporter: Exactly, David. She said she's not aware of Giuliani being involved in those efforts. She said it would certainly be a sign of good will on the part of North Korea, if those Americans are free. David? All right, Martha, thank you.

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