US President Joe Biden welcomed on Thursday the extension of a UN-brokered truce between Yemen's warring parties, and said Saudi Arabia had demonstrated "courageous leadership" by endorsing and enacting its terms. The UN's Yemen envoy Hans Grundberg announced earlier that the existing ceasefire, which began in April on the first day of Ramadan, had been extended by two months. "The last two months in Yemen, thanks to the truce brokered in April, have been among the most peaceful periods since this terrible war began seven years ago," Biden said in a statement. The American president said Oman, Egypt and Jordan had also played roles in enabling the truce process. "The United States will remain engaged in this process over the coming weeks and months" and is focused on deterring threats to its friends and partners, Biden added. He said that it is important for the parties in the conflict to work to make the truce permanent. "I urge all parties to move expeditiously towards a comprehensive and inclusive peace process. Our diplomacy will not rest until a permanent settlement is in place," Biden said. — Agencies