Yemen's Houthi group on Monday played down a new Saudi initiative to end a six-year-old war saying there was nothing new in the offer. However the group's chief negotiator Mohammed Abdulsalam said the Houthis would continue to talk with Riyadh, Muscat and Washington to try to reach a peace agreement. "Opening the airports and seaports is a humanitarian right and should not be used as a pressure tool," Abdulsalam told Reuters.