North Korea has fired three ballistic missiles into the Japan sea, says South Korean military officials.
The launches happened between 05:45 local time (20:45 GMT on Monday) and 06:40.
They were launched from the western city of Hwangju, and first two were believed to be short-range Scud missiles while the third was presumed to be a mid-range Rodong.
North Korea has been barred by UN sanctions from any test of the Ballistic missile or nuclear missile. But tensions have escalated since January when it carried out its fourth nuclear test. It has also conducted several launches recently, in June, which was considered to be most successful till date.
Seoul has said activity detected recently in North Korea indicates it could be preparing to conduct a fifth nuclear test imminently.
The US Strategic Command said it had tracked the launches, but that they had posed no risk to US interests.
The North’s military had warned it would retaliate with a “physical response”.
China has criticized the decision, saying it will destabilize security in the region.