The US got no answer from the Chinese on the radio when it said the drone was American property, the official said.
As they turned away, the Chinese did come up on the radio and indicated they were returning to their own operations.
US oceanographic research vessels are often followed in the water under the assumption they are spying. In this case, however, the drone was simply measuring ocean conditions, the official said.
Although it’s unclear what the motivation was for the Chinese, the seizing of the drone comes on the heels of other provocative incidents that have happened since President-elect Donald Trump received a congratulatory call with Taiwan’s President, a violation of the US’s agreement with China’s “One China policy”. China publicly voiced their disapproval of that incident and contacted the White House at the time.