Houthi rebels in Yemen have launched a violent new wave of attacks on ships in the Red Sea, sinking two vessels and killing crew members.

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.

You can’t let them revert back to the shadow war cost free. We got to an overt war because they never were made to feel the price of the covert war,’