Yemen's government has accepted a UN-proposed peace plan that demands Houthi-Shiite rebels to withdraw from the capital Sana'a. But Iran-backed rebels who control the capital say the United Nations has changed the terms that were agreed during talks in Kuwait.

Yemen fell into chaos after President Ali Abdullah Saleh was ousted in 2012. Security deteriorated further after Houthi rebels swept into the capital and pushed south, forcing incumbent President Abd Rabbuh Mansur Hadi's government to flee into exile in March last year.

The conflict has killed more than 6,400 people and displaced nearly 3 million since then.