WASHINGTON (AP) — Two senior American diplomats, thinking their conversation about the Ukraine was secure and private, were caught disparaging the European Union in a phone call that was apparently bugged, and U.S. officials say they strongly suspect Russia of leaking the conversation.

The suspicions were aired Thursday after audio of the call was posted to the Internet and amid continuing criticism of the United States in Europe and elsewhere over NSA spying on foreign leaders and U.S. They also came as the Russia-hosted Winter Olympics opened under tight security to prevent possible terrorist attacks and highlighted distrust between Washington and Moscow that has thrived despite the Obama administration’s attempt to “reset” relations with the Kremlin.