`` We are pretty hopeful this is a prelude to their release , '' a source tells CNN . The Saraya Swehli militia accused the journalists , who work mainly for Iran 's state-run Press TV , of lacking proper immigration paperwork . The U.S. State Department has been monitoring the situation in Yemen since March 2015, when Houthi rebels took over Sanaa and forced President Abdu Rabbu Mansour Hadi into exile. A Libyan militia accused them of lacking proper immigration papers .
`` We are pretty hopeful this is a prelude to their release , '' a source tells CNN . The U.S. State Department has been monitoring the situation in Yemen since March 2015, when Houthi rebels took over Sanaa and forced President Abdu Rabbu Mansour Hadi into exile. A Libyan militia accused them of lacking proper immigration papers .