South Korean military officials have said that North Korea test-fired four short-range missiles off its west coast into the sea.
According to BBC, the missiles had a range of about 140km, said the Joint Chiefs of Staff (JCS).
The statement said that the missiles were fired from Dongchang-ri in the north of the country on Friday afternoon.
North Korea has often conducted test-missiles in protest against US-South Korean military drills, one of which is currently going on.
The US and South Korea said that the annual exercises are for defence training purposes. However, North Korea argues that it is a rehearsal for invasion.