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

Backdated paperwork also made the Russian oligarch’s yachts and mansions disappear from accounts, investigation finds.

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.