China flew a nuclear-capable bomber over the South China Sea to send a message to President-elect Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE, Fox News reported early Monday.

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Two U.S. officials told Fox News the Chinese H-6 bomber flew above the South China Sea and several disputed islands last Thursday.

The response comes after Trump spoke with Taiwan President Tsai Ing-wen, which broke decades of U.S. protocol. Trump's call was the first by a U.S. president or president-elect since 1979, when the two countries severed diplomatic ties.

The flight was the first of its kind since March 2015, though other shorter flights have occurred since, officials told Fox News.

The Pentagon was reportedly alerted about the flight on Friday.

Read more from The Hill:

China expresses 'serious concern' over Trump's Taiwan comments