The incident took place on Monday.

The statement read that at least 10 sailors are missing, while five have sustained injuries.

"Four of the injured were medically evacuated by a Singapore Armed Forces helicopter to a hospital in Singapore for non-life threatening injuries. The fifth injured Sailor does not require further medical attention." the statement read.

A search operation is underway.

"The Republic of Singapore Fearless-class patrol ships RSS Gallant (97), RSS Resilience (82), and Singaporean Police Coast Guard vessel Basking Shark (55) are in the area rendering assistance," it added.

Meanwhile, reacting to the news, US President Donald trump tweeted, "Thoughts & prayers are w/ our @USNavy sailors aboard the #USSJohnSMcCain where search & rescue efforts are underway."

Image: www.cpf.navy.mil