According to the Pentagon, the whole incident lasted about 30-40 minutes. ไทเกอ711
During that time, Gen Ryder said there was no direct communication between the Russian and American militaries.
US officials say they believe the Russian Su-27 jets involved "likely" suffered some damage, indicating that a collision was not deliberate.
"I do know that the state department is raising our concerns about the incident directly with the Russian government," he added.
What, if anything, does the episode mean for the future of American drone operations over the Black Sea, and for the vital surveillance such operations provide to Ukraine?
"If the message is that they want to deter or dissuade us from flying or operating in international airspace over the Black Sea," Mr Kirby told broadcaster VOA, "then that message will fail because that is not going to happen".