The president's warning came after Hamas said it will indefinitely delay the release of hostages held inside Gaza. The U.N.'s Secretary General has called for the releases to carry on.

Hamas has brushed off President Donald Trump's threat that ''all hell'' will break out if it does not release the remaining Israeli hostages held in the Gaza Strip by Saturday.

The tech mogul is unlikely to win. But his goal may be more about making life difficult for the A.I. start-up and its leader, ...