Yemen's Iran-aligned Houthis have advanced to within 80km of Aden, the main stronghold and temporary capital of the country's internationally recognised government, four military sources told Reuters on Monday.
The advance brings the Houthis closer to Aden than at any point since the early months of the war in 2015, when they briefly entered the city before being driven out.
The latest offensive has opened a volatile new front in the wider US-Israeli war on Iran, drawing both the Houthis and Saudi Arabia deeper into the regional conflict.
The Houthis have escalated their attacks on Saudi Arabia, which backs Yemen's government, while the Saudi-led coalition has responded by stepping up strikes on Houthi positions in Yemen.
The violence has shattered a 2022 UN-brokered truce that had largely halted major attacks in a war that began in 2014, when the Houthis drove the government from Sanaa.
The Houthi push threatens strategic positions along the main road linking Aden with the besieged city of Taiz, a vital artery for south-western Yemen.
It follows a broader offensive that began in September, when the Houthis swept down Yemen's....
