Nov 12 (Reuters) - Saudi Arabia said debris from two ballistic missiles intercepted by its air defences fell in the Mecca region on Wednesday, as the kingdom and Yemen's Iran-aligned Houthis continued to trade attacks in an escalating conflict. Debris from intercepted missiles falls in Mecca Saudi Arabia said debris from two ballistic missiles intercepted by its air defences fell in the Mecca region on Wednesday, as the kingdom and.