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.

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.

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.