A Saudi soldier fires a mortar towards Houthi movement position, at the Saudi border with YemenBy Mohammed Ghobari Mohammed Mukhashef CAIRO/ADEN (Reuters) – Saudi-led coalition warplanes bombed Yemen on Wednesday despite an announcement by Riyadh that it was ending its campaign of air strikes, while renewed fighting erupted on the ground between rebels and forces loyal to the exiled president. The hostilities illustrated how tough it will be to find a political solution to a war stirring animosities between rival Gulf powers Saudi Arabia and Iran. Tuesday’s announcement by Riyadh that it would end almost a month of air strikes against the Iranian-allied Houthis drew positive responses from both the White House and Tehran. A Saudi air strike hit the headquarters shortly afterwards, residents said.