(VOVworld) - Three Saudi troops and "dozens" of Houthi rebels were killed as Saudi forces repelled a major attack from inside Yemen.

The rebels attacked near the town of Najran, reports say, in what would be their biggest assault on Saudi soil since a Saudi military campaign began. A Saudi-led coalition has staged air strikes against rebels since late March in support of Yemen's exiled president. Meanwhile aid groups say a lack of fuel is threatening their operations there.