Australia is being urged to boost aid for Yemen as thousands of civilians starve in the fourth year of the civil war.

Oxfam Australia’s humanitarian Policy Advisor, Dr Nicole Bierke, said the situation in the middle eastern nation is critical and more financial aid is needed from countries such as Australia to provide food and water.

Australia provided $20 million in humanitarian funding to Yemen last year but Bierke said more is needed with 22 million in need of aid due to blockades enforced by Saudi Arabia.