Sri Lanka, Oct. 12 -- North Korea fired several ballistic missiles towards the sea off its east coast on Monday, according to the South Korean military.

It was the fourth missile test carried out by Pyongyang within a month, and is believed to have been in response to a recent hypersonic missile test by South Korea, foreign media reported.

According to South Korea's Joint Chiefs of Staff, the missiles, which appeared to be of different types, were launched from near Pyongyang at around 9:20 in the morning local time. One of them was reported to have flown more than 900 kilometres.

Earlier, the Japan Coast Guard said North Korea had fired two unidentified projectiles believed to be ballistic missiles, both of which had already fallen in...