North Korea fired cruise missiles — the number was not specified — in the direction of the East Sea, also known as the Sea of ​​Japan, South Korea’s national defense general staff said, in its fifth consecutive weapons test this year.

“The armed forces detected the launch of cruise missiles of an unknown type towards the waters northeast of Wanshan at around 09:00 (local time; 02:00 Greek time)” and “intelligence services” of South Korea and the US are conducting “detailed analysis,” the staff explained in a statement.

According to the same source, “surveillance and vigilance have been increased” at the border and the situation is being “closely monitored” for the possibility of any “further” action.

The day before Monday, Pyongyang announced that it had tested a new multiple missile launcher fire control system, which it says boosts its defense capabilities.

Earlier this year, nuclear-armed North Korea declared South Korea its “greatest enemy,” shut down organizations dedicated to reunification and contacts with Seoul, and threatened to declare war if the neighbor dared to violate its territorial sovereignty.

Pyongyang has multiplied its military weapons tests. It went ahead with tests of an “underwater nuclear weapons system” and a solid-fueled hypersonic ballistic missile.

It also engaged in a series of tests of cruise missiles, a weapons system that North Korea could make available to Russia for use in the war in Ukraine, according to analysts.

Pyongyang and Moscow have strengthened ties in recent months, with North Korean leader Kim Jong Un making a rare trip to Russia for talks with Russian President Vladimir Putin in September.

South Korea and the US say that despite international sanctions, North Korea is sending weapons and ammunition to Russia, possibly in exchange for technical assistance, especially in a program aimed at acquiring military satellites.

Tests of cruise missiles are not normally prohibited under UN Security Council sanctions against North Korea, unlike those of ballistic missiles and nuclear weapons.