The U.S., South Korea and Japan have started sharing real-time data on North Korean missile launches for the first time, Seoul’s defense ministry said Tuesday, a day after Pyongyang launched a solid-fuel intercontinental ballistic missile (ICBM).

The move to operationalize the trilateral data-sharing system comes more than a year after the countries’ leaders first discussed the plan during a summit in Cambodia in Nov. 2022, seeking to improve their ability to assess missile threats.

“The North Korean missile warning information real-time sharing system has been verified for full operational capability through the results of a recent preliminary inspection and is