Taiwan said a Chinese fighter jet briefly entered its air defense zone on Tuesday, the third incursion in a week, prompting the island to scramble its own aircraft in response.
Beijing views democratic self-ruled Taiwan as its own territory and has vowed to one day seize it, by force if necessary.
Taiwan鈥檚 air force said its planes broadcast warnings and 鈥渢ook active intercept responses鈥� as China鈥檚 J-10 fighter briefly flew into the island鈥檚 southwestern air defense identification zone (ADIZ).
The latest incursion came a week after multiple Chinese Su-30 jets entered Taiwan鈥檚 ADIZ last Tuesday, hours after a US military transport plane flew over the island in a move that China called an 鈥渋llegal act鈥� and 鈥渟erious provocation鈥�.
A Chinese military Y-8 transport aircraft also briefly entered Taiwan鈥檚 defense zone on Friday.
The ADIZ stretches beyond Taiwan鈥檚 airspace and is used to give an early warning of possible incursions. China maintains a similar air defense zone.
Beijing has ramped up fighter flights and military exercises near Taiwan since the 2016 election of President Tsai Ing-wen, who refuses to acknowledge that the island is part of 鈥渙ne China鈥�.
It has also sought to diplomatically and economically isolate the island.
Tsai was elected for a second term in January with a record landslide in a vivid rebuke of Beijing鈥檚 hardline stance.
In February, she criticized Beijing for a 鈥渕eaningless and unnecessary鈥� move when a fighter jet crossed the median line of the Taiwan Strait separating the two sides.
In March 2019, two Chinese J-11 fighter jets crossed over the median line for the first time in years.
Beijing also sent its new aircraft carrier, the Shandong, through the strait in December, shortly before Taiwan鈥檚 presidential election.