The U.S. military said on Thursday a blast on Sunday near a UNESCO world heritage site in Yemen's capital city of Sanaa was caused by a Houthi missile and not an American airstrike.

London discussions between the US, United Kingdom, Ukraine, France and Germany ended Wednesday without agreement on the terms of a potential peace deal — but with promises to keep talking, as Ukraine President Volodymyr Zelensky again insisted ceding Crimea to Russia was a non-starter.

Talks between the U.S., Ukraine and European officials to discuss ending Russia's war in Ukraine faltered as Secretary of State Marco Rubio abruptly cancelled his trip to London.