Among the 22 jets entering the airspace around Taiwan, 12 crossed the median line, the statement read.

Taiwan's military "closely monitored" the situation and deployed aircraft and vessels to "appropriately" react to Chinese military drills around the island, the Defense Ministry added. It also said drones "intruded" into outlying islands controlled by Taiwan.

China announced the drills -- whose scale marks a significant escalation from past activities -- within an hour of the arrival of Pelosi and a congressional delegation in Taiwan on Tuesday evening. The stop, which was expected but not announced beforehand, was part of a larger Asia tour.

On Saturday, 14 vessels and 20 planes operated by the Chinese military were detected around the strait, according to Taiwan's Defense Ministry. Of the 20 aircraft, 14 crossed the median line, it added.

On Friday, 68 Chinese warplanes were reported in the Taiwan Strait, according to the ministry. Of those, 49 entered Taiwan's air defense identification zone -- a buffer of airspace commonly referred to as an ADIZ. That was just a few planes short of the record set last year when 56 Chinese warplanes entered the ADIZ on the same day.

Taiwan's Premier Su Tseng-chang on Sunday reiterated Taiwan's condemnation of the drills.

"Not only Taiwan but other countries in the region as well as freedom-loving countries like the US and so on have vehemently protested and condemned China's arrogant military operations disrupting regional peace and stability," he said during a press engagement.

"We call on the Chinese government to not flex its military muscles and disrupt regional peace."

A US National Security Council spokesperson on Saturday called China's recent military activities around Taiwan a "significant escalation in China's efforts to change the status quo."

"They are provocative, irresponsible, and raise the risk of miscalculation," the spokesperson said. "They are also at odds with our long-standing goal of maintaining peace and stability across the Taiwan Strait, which is what the world expects."

US allies have also come forward to condemn China's actions, including in a joint statement issued Friday by US Secretary of State Antony Blinken, Australian Foreign Minister Penny Wong, and Japanese Foreign Minister Hayashi Yoshimasa following their meeting on the sidelines of the ASEAN Foreign Ministers' Meeting in Cambodia.

The diplomats "condemned (China's) launch of ballistic missiles," including those the Japanese government said landed in its exclusive economic zone, for "raising tension and destabilizing the region," and called on China "to immediately cease the military exercises," according to the statement released by the US State Department.

"China is the victim of political provocation from the US. The actions taken by the Chinese government to safeguard state sovereignty and territorial integrity and curb the separatist activities are legitimate and justified," a statement from the embassy read.