The technician, thought to be a man, used the firm's remote working tools to get into the corporate network, and proceeded to download company data.

Zelensky's comments came days after visiting several European capitals to press his case for more military and financial help in the war against invading Russian forces.

The nuclear-armed North has accused Seoul of flying drones over its capital to drop propaganda leaflets filled with "inflammatory rumours and rubbish", and warned on Sunday that it would consider it "a declaration of war" if another drone was detected.

North Korea's army said on Wednesday it was moving to "permanently shut off and block the southern border" with the South and had informed the US military to prevent an accidental clash.

Ukrainian media have reported that six North Korean military officers were killed in a Ukrainian missile attack on Russian-occupied territory near Donetsk on October 3.

Relations between the two Koreas are at one of their lowest points in decades, with Seoul this week staging a military parade where it showcased its bunker-busting "monster" missile and President Yoon Suk Yeol warned Kim that using nukes would mean the end of his regime.

Suicide drones are explosive-carrying unmanned drones designed to be deliberately crashed into enemy targets, effectively acting as guided missiles.

The olive green mobile launchers were displayed during a special "transferring" ceremony in the capital Pyongyang on Sunday, the official Korean Central News Agency reported.

The official Korean Central News Agency (KCNA) reported leader Kim Jong Un last week "personally guided" a military rescue -- including 10 helicopters and navy lifeboats -- shaking the hands of the pilots "one by one".

"The chemical, biological and radiological (warfare) response team has safely collected the trash balloons," the presidential security service told AFP.

North Korean diplomat Ri Il Kyu had been responsible for political affairs at Pyongyang's embassy in Cuba since 2019, tasked specifically "with obstructing the establishment of diplomatic relations between South Korea and Cuba", according to South Korea's Chosun Daily.

The statement came a day after South Korea's military said the North had test-fired what appeared to be a hypersonic missile on Wednesday, but the launch ended in a mid-air explosion.

Putin is scheduled to touch down on Tuesday night for his first trip to the isolated nation in 24 years, with a confrontation between North and South Korean troops on their shared border highlighting regional security tensions.

The South Korean government this month fully suspended a 2018 tension-reducing military deal and restarted loudspeaker propaganda broadcasts along the border in response to Pyongyang's balloons, infuriating the North which warned Seoul was creating "a new crisis".

The launch follows a failed attempt by the nuclear-armed North to put a second spy satellite into orbit on Monday, shortly after Seoul, Beijing and Tokyo held a rare summit and called for Pyongyang to give up their nukes.

South Korea and the United States have repeatedly accused North Korea of supplying weapons to Moscow, despite a raft of UN sanctions on both countries that would ban any such arms transfers.

North Korea's former propaganda chief, credited with masterminding the personality cult surrounding the ruling Kim dynasty, has died, state media said Wednesday, with leader Kim Jong Un photographed bowing at his funeral bier.

Tokyo also confirmed the launch, with the Japanese defence ministry saying "a suspected ballistic missile was launched from North Korea" in a post on X, formerly Twitter.

Seoul and Washington say Kim has been shipping weapons to Russia, possibly in exchange for Moscow's technical assistance for Pyongyang's budding spy satellite programme.

Video in state media showed the missile being carried into position on its launching vehicle, as Kim and an array of uniformed soldiers stood by watching, before the missile blasts off, trailing plumes of smoke and flames.

Seoul's military said the missile, launched early Tuesday, flew around 600 kilometres (373 miles) before splashing down in waters between South Korea and Japan.

"A ground jet test of a solid-fuel engine for new-type intermediate-range hypersonic missile, which is of another strategic value," KCNA said.

Seoul's Unification Ministry on Monday added its voice to growing speculation around Kim Jong Un's succession plans, saying they have not "ruled out" that his daughter could be next in line to lead North Korea.

North Korea leader Kim Jong Un drove a "new-type main battle tank" while overseeing military training exercises, state media said Thursday, as Seoul and Washington wrap joint drills to improve deterrence.

So far this year, Kim has declared South Korea his country's "principal enemy", jettisoned agencies dedicated to reunification and outreach, and threatened war over "even 0.001 mm" of territorial infringement.

North Korean leader Kim Jong Un oversaw the test launch of a new strategic cruise missile from a submarine, state media said Monday, the latest tension-raising move by the nuclear-armed state.

China's vice foreign minister was in Pyongyang on Friday for a meeting with his North Korean counterpart.

After years of worsening ties, Pyongyang made it official this week: declaring Seoul its main enemy, abolishing agencies dedicated to reunification and threatening to occupy the South during war.

Russian President Vladimir Putin met North Korea's top diplomat in the Kremlin on Tuesday in the latest sign of deepening ties between the two authoritarian states.

The launch, Pyongyang's first known weapons test this year and its first ever test of a solid-fuel hypersonic intermediate-range ballistic missile (IRBM), was detected by Seoul's military Sunday afternoon.