Yemen's Houthi rebels have resumed their attacks on Red Sea shipping, saying they aim to force Israel to cease fire in Gaza -- a move that threatens a truce with Washington and rattles maritime trade.

Commercial ships are broadcasting messages about their nationality and even religion on their public tracking systems to avoid being targeted by Yemen's Houthis.

Yemen's Huthi rebels have resumed their attacks on Red Sea shipping, saying they aim to force Israel to cease fire in Gaza  -- a move that threatens a truce with Washington and rattles maritime trade.