TAIPEI (Reuters) - Taiwan's security and armed forces must increase their surveillance and alertness on military activities in the region, President Tsai Ing-wen said on Wednesday during a meeting to discuss the Ukraine crisis.

       Taiwan and Ukraine are fundamentally different in terms of geostrategic, geographical environment and importance of international supply chains, but government units must tackle possible "cognitive warfare" and misinformation by foreign forces, Tsai's office cited her as saying.

       (Reporting by Yimou Lee and Ben Blanchard; Editing by Tom Hogue)