The Pentagon has released a video showing a Russian fighter jet allegedly conducting an unsafe intercept of a US Air Force surveillance drone over the Black Sea.
The video also shows the Russian jet dumping fuel on the drone before colliding with its propeller.
The US is said to be starting to retrieve the wreckage of the drone that crashed into the Black Sea.
However, Russia is claiming that the US military was flying in a restricted flight zone and is at fault for the incident.
The international airspace over the Black Sea has been a site of tension between Russia and the US in recent years.
The incident is likely to further strain the already tense relationship between the two countries.