On March 31, two People’s Liberation Army Air Force (PLAAF) J-11 fighter jets crossed the middle line on the Taiwan Straits on Mar. 31, forcing Taiwan to scramble its own fighters.

The Defence Ministry said Taiwan scrambled its own aircraft on Sunday morning and broadcast warnings after two J-11 fighter jets crossed over the “median line” within the waters that separate the island from the mainland.

“At 11 am, March 31, 2 PLAAF J-11 jets violated the long-held tacit agreement by crossing the median line of the Taiwan Strait,” the Ministry of Foreign Affairs said on Twitter.

“It was an intentional, reckless and provocative action. We’ve informed regional partners and condemn China for such behavior,” the ministry added.

According to local Taiwan media, the Sunday incident triggered a 10-minute standoff between jets from the two sides.

China and Taiwan have been separately governed since the end of a brutal civil war in 1949. Beijing views the self-governed island as part of its territory.

At 11 a.m., March 31, 2 PLAAF J-11 jets violated the long-held tacit agreement by crossing the median line of the #Taiwan Strait. It was an intentional, reckless & provocative action. We’ve informed regional partners & condemn #China for such behavior.

— 外交部 Ministry of Foreign Affairs, ROC (Taiwan) (@MOFA_Taiwan) 31 March 2019