April 5 (UPI) — Explosives were found in a border area between Hungary and Serbia near a pipeline that carries Russian gas, and which both depend heavily on.

Serbian president Aleksander Vucic said Sunday that the explosives were found in backpacks “a few hundred miles from the gas pipeline,” and that he’d alerted Hungarian Prime Minister Viktor Orban that an investigation was being mounted, CNN and The BBC reported.

“Our units found an explosive of devastating power,” Vucic said on Instagram. “I told PM Orban that we would keep him updated on the investigation.

Experts have suggested that a false flag, or staged, operation could be conducted in one of the two countries to help Orban in his re-election campaign, which has seen support for his 16-year rule in Hungary sagging.

Vucic said that although there were “certain traces” of the origin of the explosives and the backpacks that contained them, he could not offer details as Serbia’s military and police authorities are conducting their investigation.

The purchase and use of Russian oil by Hungary and Serbia, both of whose leaders are allies of Russian President Vladimir Putin, has been controversial in Europe amid Putin’s now four-year-long war to take Ukraine.

Orban, who has previously accused Urkaine of blocking its ability to get the fuels it needs, said Sunday in a post on X that an investigation into the “powerful explosive device” is ongoing and that he had convened an emergency meeting of his defense council this afternoon.

Orban allies have suggested that Ukraine could be behind the attempted explosion based on previous allegations that the country is interfering with Russian-linked gas and fuel facilities amid the ongoing war.

These allegations included Hungarian Foreign Minister Peter Szijjarto said it would be “illogical” for it to blow up its own gas pipelines, Ukrainska Pravda reported.

“In recent weeks, dozens of drones have been constantly attacking the TurkStream pipeline, which supplies gas to Hungary, on Russian territory, and now the terrorist attack foiled by Serbia appears to be part of these attacks,” Szijjarto said.

Sunday, Ukrainian Foreign Ministry spokesperson Heorhii Tykhyi said that “Ukraine has nothing to do with this,” Ukriniform reported.

“We categorically reject attempts to falsely link Ukraine to the incident with explosives found near the Turkstream pipeline in Serbia,” Tykhyi said, noting that the incident could be a Russian effort to affect the upcoming election in Hungary.