Saudi Arabia intercepts Houthi missile fired toward Riyadh; no reported casualties

By Katie Paul and Rania El GamalRIYADH (Reuters) - Saudi air defenses shot down a ballistic missile fired by Yemen's Houthi group toward Riyadh on Tuesday, the Saudi-led coalition said, in an attack that could escalate a proxy war between the kingdom and Iran.In contrast, a U.N. human rights spokesman said coalition air strikes had killed at least 136 non-combatants in wartorn Yemen since December 6.The Iran-aligned Houthi movement said it had aimed the missile at the Saudi royal court at al-Yam