The jet disappeared from radar screens around half an hour after taking off for a routine training mission from its base in southwestern Taiwan on Tuesday.

The air force said the jet plunged into the sea with no sign of the 28-year-old pilot ejecting in time.

The national rescue centre said wreckage of fuselage had been found but there were no signs of the pilot following an all-night search involving multiple helicopters, coastguard vessels and over 60 officials.

The incident has dealt a blow to the new squadron of US-made F-16Vs that was commissioned in November as Taiwan upgraded its ageing fleet amid rising tensions with China.

The airforce has temporarily grounded its entire F16 fleet.

Beijing claims self-ruled Taiwan as part of its territory and has vowed to take it one day, by force if necessary.

Under President Xi Jinping, China has ramped up economic, diplomatic and military pressure on Taiwan.

Taiwan's air force has suffered a string of fatal accidents in recent years as its kept under constant pressure by China, which has ramped up incursions into its air defence zone since 2020.

Last year, Taiwan recorded 969 incursions by Chinese warplanes into its air defence zone, according to a database compiled by AFP, more than double the roughly 380 carried out in 2020.

Last March, Taiwan grounded all military aircraft after a pilot was killed and another went missing when their fighters collided mid-air in the third fatal crash in less than six months.