North Korea is likely to test another nuclear device and more missiles, the US’s top soldier in South Korea said Monday as he warned that combined US-South Korean forces could “quickly and decisively defeat” North Korea if it were to escalate its defiance into an attack.

“I can only surmise that since they tested one, we would see at some time in the future yet another test of a nuclear device,” said General Burwell B. Bell, commander of US Forces Korea, without specifying any kind of time frame.