North Korea on Wednesday protested the United States' flyover of two B-1B nuclear-capable strategic bombers over South Korea, saying such "reckless provocations" should stop.

The US Air Force on Tuesday flew the B-1B Lancers over Osan Air Base, south of Seoul, as a warning to North Korea following its fifth nuclear test last week.

The North's Korean Central News Agency (KCNA) blasted the exercise as a "military provocation" revealing Washington's intentions to mount a pre-emptive nuclear attack.

"They are blustering this is a 'demonstration of fulfillment of their strong commitment to protecting' south Korea and 'strong warning' to the DPRK, in particular," the KCNA said in an English dispatch, monitored in Seoul. DPRK is the acronym for North Korea's official name, the Democratic People's Republic of Korea.

It also claimed the US will continue to bring nuclear carriers and other nuclear strategic means to the region in a bid to prepare for a nuclear attack.

"These extremely reckless provocations of the US imperialist warmongers are pushing the situation on the Korean peninsula to the point of explosion hour by hour," the KCNA said, warning that the North's military has the means to "beat back any aggression and provocation at a single blow."

"They had better stop their rash actions," it added. (Yonhap)