Taiwan has complained of repeated Chinese military activity near it over the past two years, mostly flights into the island's air defence zone, part of a pattern of what Taipei views as pressure from Beijing to accept China's sovereignty claims over the island.
Taiwan on Sunday reported the largest incursion since October by China's air force in its air defence zone, with the island's defence ministry saying Taiwanese fighters scrambled to warn away 39 aircraft in the latest uptick in tensions.
In comments to a meeting of Taiwan's National Security Council, Tsai said the Ukraine situation needed close attention.
"Taiwan has faced military threats and intimidation from China for a long time. Therefore, we empathize with Ukraine's situation, and we also support the efforts of all parties to maintain regional security," her office cited her as saying at the meeting.
Tsai has asked the National Security Council to set up a working group on the Ukraine situation to watch developments and the possible impact on Taiwan's security, her office added.
Peace and stability in the Taiwan Strait and the Indo-Pacific region is not only the shared responsibility of all parties, but also the common expectation of the international community, Tsai said.
"The military is definitely not an option to resolve disputes - this is a universal truth."
Russia said on Thursday it was clear the United States was not willing to address its main security concerns in their standoff over Ukraine, but both sides kept the door open to further dialogue.
The United States and NATO submitted written responses on Wednesday to Russia's demands for a redrawing of post-Cold War security arrangements in Europe since it massed troops near Ukraine, prompting Western fears of an invasion and new U.S. pledges of defence support.
(Reporting by Ben Blanchard; editing by Jane Wardell)
