More than a dozen US sailors have been injured after a nuclear submarine hit an unknown object while operating in international waters in the Indo-Pacific region. US officials said,fifteen sailors received minor injuries when the USS Connecticut collided with the object on Saturday. They added that it was unclear what had caused the collision.<br />''<br />''The incident comes as tensions mount over a recent uptick of Chinese incursions into Taiwan's air defence zone.<br />''<br />''Taking to Twitter, the US Navy's Pacific Fleet said, the submarine remains in a safe and stable condition. It said, USS Connecticut's nuclear propulsion plant and spaces were not affected and remain fully operational.<br />''<br />''The extent of damage to the remainder of the submarine is being assessed. The US Navy has not requested assistance. The incident will be investigated.<br />''<br />''A US Navy spokesperson said, the submarine is now headed towards the US territory of Guam. <br />