Deputy US attorney general Rod Rosenstein announces that 12 individuals have been charged as part of the investigation into Russian interference in US presidential elections.

A dozen Russians were criminally charged on Friday with hacking and leaking the emails of senior Democrats during the 2016 presidential election campaign.

Grand jury indictments against the 12 alleged Russian intelligence officials were announced by Rod Rosenstein, the deputy US attorney general, at a press conference in Washington.

“The internet allows foreign adversaries to attack America in new and unexpected ways,” said Rosenstein. Lamenting what he called “partisan warfare” in the US around the ongoing  Russia inquiry, Rosenstein said: “The blame for election interference belongs to the criminals who committed election interference.”

The charges were filed in Washington by Robert Mueller, the special counsel, who is investigating Russian interference in the election and possible collusion with members of Donald Trump’s campaign team.

They were announced just as Trump arrived at Windsor Castle to meet the British monarch, Queen Elisabeth II , and as he prepared to meet Vladimir Putin, Russia’s president, on Monday.

Rosenstein said he had briefed Trump on the developments.