The top U.S. commander in the Pacific warned senators Thursday that the military support that China and North Korea are giving Russia in its war on Ukraine is a security risk in his region as Moscow provides critical military assistance to both in return.

Paparo said North Korea is sending “thousands, maybe hundreds of thousands of artillery shells” and thousands of short-range missiles to Russia. The expectation, he said, is that Pyongyang will get air defense and surface-to-air missile support.