Hundreds of stores were targeted by the overnight hack, which spoiled fresh and frozen food estimated to be worth millions of euros.

Omar was first elected to Congress in 2018, and is an outspoken critic of President Donald Trump.

Security correspondent Frank Gardner explains how the Iran-backed Houthis' precision strikes and guerrilla tactics have made it difficult for Saudi forces to gain the upper hand.

It comes after the armed group hit Riyadh's international airport and another facility, killing 13 people, in a significant escalation.