The first air raid alert has been issued for Riyadh, the capital of Saudi Arabia, due to attacks by Yemen's Houthi rebels that are shaking up the Middle East situation.

This marks an escalation in the Houthis' offensive, following their successive seizure of key choke points in the Red Sea, now extending all the way to the Saudi capital.

Concerns over a full-scale war are growing as Saudi Arabia has responded with continuous airstrikes against Houthi bases and communication facilities, while Pakistan has even hinted at the possibility of providing military support to Saudi Arabia.