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used by authoritarian regimes worldwide to monitor dissidents has been found on British Prime Minister Boris Johnson's phone, The New Yorker magazine on Monday.

Experts from the University of Toronto's Citizen Lab came across multiple signs thatÌýthe had been used to infect devices belonging to the UK Prime Ministry and Foreign Office, including Johnson's phone.

The cyberattack against Johnson is believed to have originated in the United Arab Emirates, the researchers said.

The attacksÌýtargeting devices belonging to the Foreign office were linked to the UAE, India, Cyprus and Jordan.

"We will occasionally observe cases where we suspect that governments are using spyware to undertake international espionage against other governments,"ÌýRon Deibert, director of the Citizen Lab and Professor of Political Science at the University of Toronto’s Munk School of Global Affairs & Public Policy, told The New Yorker.

Deibert's team notified the UK government in 2020 and in 2021 that they had identified suspected instances of Pegasus infections.

The Pegasus software, developed by a private Israeli company called theÌý, gives hackers access to a phone's entire contents and allows them to use its camera and microphone at will. In many instances, Pegasus has been used by authoritarian regimes to .

The NSO GroupÌýthat its software is not used against human rights defenders, and instead plays a vital role in combatting "terrorists, paedophiles and hardened criminals."