Ukraine's defeat against Russia is "a matter of time," Venezuelan President Nicolas Maduro suggested on Monday.

"It's a matter of time before Ukraine is defeated. It is a matter of time when [Russian President Vladimir] Putin and Russia achieve the goals of denazification of Ukraine. They will do it," Maduro said during his TV show "Con Maduro +".

He added that Ukraine already "looks like a loser in the aggressive war against Russia."

The Venezuelan leader also pointed out that it is the United States and European countries' responsibility to deter Ukraine from plans affecting nuclear power plants.

"The US and Europe must stop [Ukrainian President Volodymyr] Zelensky's terrorist plans for nuclear power plants and guarantee political dialogue, ensure that Ukraine surrenders and Nazism in Ukraine stops," Maduro stressed.

This comes days after a Russian security agency's representative told Sputnik that the Ukrainian armed forces were planning to use charges with radioactive warheads to attack nuclear power plants (NPPs) in Kursk and Zaporozhye (also known as Zaporizhzhia) regions.

Military correspondent Marat Khairullin also cited sources as saying that the Ukrainian armed forces are reportedly preparing to detonate a dirty nuclear bomb and plan to target storage sites for spent nuclear fuel.

The military-civil administration of the Kharkiv region indicated that the Ukrainian strikes on nuclear facilities are aimed at accusing Russia of provocation.

Sergei Lebedev, the coordinator of a local pro-Russian underground network, also told Sputnik that the planned attacks on the Kursk and Zaporozhye NPPs are being overseen by Western intelligence services, particularly from the UK.

Ukraine launched an offensive attack in the Kursk region on August 6 as part of its war with Russia, losing more than 2,800 service people and 41 tanks. Some of the weapons used by the Ukrainian forces are generally funded or provided by the US-led NATO military alliance.

Russia's Defense Ministry affirmed that a "man-made disaster in the European part of the continent" would be faced with "tough military and military-technical countermeasures."

Meanwhile, Russian Foreign Ministry spokesperson Maria Zakharova urged the international community "to immediately condemn the provocative actions prepared by the Kiev regime."

Read more: Documents says Ukraine used fresh NATO equipment to attack Kursk