Belgian prosecutors are looking into possible Russian interference in the upcoming European Parliament elections following findings provided by intelligence services, Prime Minister Alexandre De Croix said on Friday.

According to the Belgian prime minister, investigators have found that Russian groups are meddling in European elections to promote pro-Russian candidates and thus weaken European support for Ukraine.

“The aim is to help elect more pro-Russian candidates to the European Parliament and to strengthen a pro-Russian narrative in this body,” De Cro told reporters.

“Weakened European support for Ukraine serves Russia on the battlefield,” he said.

De Cro said the Belgian investigation was launched after Czech authorities discovered pro-Russian agents active in Brussels seeking to influence, and even pay, European lawmakers to push a pro-Russian agenda.

It appeared that no cash payments were made in Belgiumalthough there had been an intervention there, he said.

The West has repeatedly accused Russian agents of using social media and the internet to spread false or misleading information to undermine it, promote Russia or try to influence election campaigns.

Russian authorities have repeatedly denied the accusations.

Ahead of June’s European elections, parties that have criticized the EU’s support for Ukraine, such as France’s far-right Rassemblement National, Austria’s Freedom Party and Germany’s AfD, are expected to increase their numbers from previous European elections.

De Cro said he had called for an urgent meeting of the European Union’s Agency for Criminal and Justice Cooperation (EuroJust) to discuss the matter and suggested that OLAF, the EU’s anti-fraud agency, prosecute the case .

“We have a responsibility and our responsibility is to defend that every citizen’s right to a free and safe vote can be preserved,” he said.