China has ramped up military activity around Taiwan in recent years as Beijing pressures Taipei to accept its claims of sovereignty over the island.

The Chinese aircraft were spotted from 9:00 am (0100 GMT) and 35 of them crossed the median line of the Taiwan Strait, which separates mainland China and Taiwan, and entered Taiwanese airspace on their way to the Western Pacific Ocean, the defence ministry said.

Taiwan's military responded by deploying aircraft, naval vessels and shore-based missile systems, the ministry said.

The exercise came a day after Taiwan said it had detected a Chinese military "joint combat readiness patrol" around the island involving fighter jets and warships.

Taiwan spotted 27 Chinese aircraft and six warships in the 24 hours to 6:00 am on Sunday, the ministry said earlier.

China considers Taiwan part of its territory and has refused to rule out the use of force to bring the democratic island under its control.

Beijing held large-scale military drills around Taiwan last month, which were condemned by Taipei and its key backer the United States.

The Chinese military conducted long-distance training flights in late September, the ministry said previously, when Beijing also fired an intercontinental ballistic missile into the Pacific Ocean.