Taiwan's defense ministry said on Saturday it was monitoring "waves" of missile tests taking place in China's far northern region of Inner Mongolia and that its air defense forces were on alert.
Taiwan's forces are continuously monitoring developments and the air defense forces are on alert, the ministry said, without giving details.
China's defense ministry did not answer calls seeking comment outside of office hours.
Taiwan operates powerful radar stations on some of the peaks of its central mountain range that can look far into China, according to security sources.
China detests Taiwan President Lai Ching-te, who took office in May, calling him a "separatist", and has increased its military pressure including war games since his inauguration.
Persons:
Nancy Pelosi, Lai Ching, Lai
Organizations:
Peoples, China's, Force, U.S . House, Taiwan
Locations:
Beijing, Peoples Republic of China, China's, Inner Mongolia, Taiwan, China, Taipei