Two US senators on Tuesday accused China of hampering a congressional probe into how counterfeit electronics end up in the US military supply chain by denying entry visas to investigators.

“I can’t say that I’m surprised, but I surely am disappointed and it’s not in their interest,” Democratic Senate Armed Services Committee Chairman Carl Levin told reporters. “I am disappointed that they don’t see that.”

“The United States and China are not destined to be adversaries. We have overlapping interests and this is actually one of them,” said Senator John McCain, the top Republican on Levin’s panel.