According to the Saudi Press Agency (SPA), the new contribution would complement $3 billion earlier deposited into the Yemeni Central Bank.
The Yemeni rial recently lost half its value in comparison to pre-war figures, which has resulted in a sharp increase in prices of goods and services. At present the official rate of exchange is over 250 Yemeni rials to one US dollar.
Yemen has been engulfed in an armed conflict between government forces led by President Abd Rabbuh Mansour Hadi and the Houthi rebels for several years. A Saudi-led coalition has been carrying out airstrikes against the Houthis at Hadi's request since March 2015.