Russia has asked China for military ​equipment to ​support its invasion of Ukraine, ​according to US officials, sparking concern in ​the White House that Beijing ​may undermine western efforts to help Ukrainian forces defend their country. US officials told the Financial Times that Russia had requested military equipment and other assistance since the start of the invasion. They declined to give details of what Russia had requested. Another person familiar with the situation said the US was preparing to warn its allies, amid some indications that China may be preparing to help Russia. Other US officials have said there were signs that Russia was running out of some kinds of weaponry as the war in Ukraine extends into its third week.