SINGAPORE, April 18 -- The imposition of broad US tariffs risks undermining global security by disrupting international norms and forcing countries to prioritise self-reliance, Singapore's Home Affairs Minister K. Shanmugam reportedly said.

The Straits Times quoted Shanmugam warning that shifting away from a rules-based global order would compel nations to look inward for security.

"We don't know whether the world, as we know, has gone permanently, or Mr Trump will have a change of heart, but it is going to be a very difficult environment and, inevitably, big countries will start giving incentives and putting up more barriers, because when the US does it, others have to do it too," he said.

Shanmugam added that Singapore Prime Minister...