North Korea says it has tested a new type of "tactical weapons".
A report carried by the Korean News Agency (KCNA) contained some details, but said that the weapon had a "powerful warhead".
This would be the first public weapons test as talks between North Korean leader Kim Jong-un and US President Donald Trump ended without agreement.
North Korea made a similar claim last year, which watchers considered as an attempt to put pressure on the US.
Last week, Mr. Kim said Trump must have the "right attitude" to continue after the end of the summit in February.
What is North Korea claiming?
According to KCNA, the test was overlooked by Mr. Kim himself.
The weapon has a "peculiar way of flying," KCNA added, adding that the test was "fired in different ways in different ways".
Mr. Kim said the development was "of great importance for increasing the fighting strength of the People's Army".
No further information was provided, even if it is a rocket species. The word tactical, however, means that it is a melee weapon, and not the ballistic long-range missiles that are considered a threat to the United States.
Satellite imagery at the North Korean nuclear power plant showed a move last week, suggesting a land reprocessing radioactive material to bomb fuel.
Last year, the North Korean leader said he would stop nuclear testing and intercontinental ballistic missile launch, as Pyongyang's nuclear capabilities had been "verified".
The country claims to have developed an atomic bomb small enough to fit a long-range missile, as well as ballistic missiles that could possibly reach the US mainland.
North Korean analyst Ankit Panda noted that the latest announcement followed new US South Korean military exercises calling the reported test "tit-for-tat."