India, July 9 -- China's recent test launch of a long-range ballistic missile from a nuclear-powered submarine has triggered concern among the United States and several Indo-Pacific nations, with analysts viewing the exercise as a demonstration of Beijing's expanding nuclear deterrence capabilities.

The missile was launched into international waters in the South Pacific during what Chinese authorities described as a routine military exercise. The test marked one of the country's rare public demonstrations of a submarine-launched ballistic missile (SLBM), highlighting the growing role of its sea-based nuclear forces.

The United States criticised China for providing only limited advance notice before the launch, while Australia, New Zeala...