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Investigators from the Israeli police secretly used Ìýto snoopÌýon citizens' phones, the Israeli police Ìýfor the first time on Tuesday.

An internal probe uncovered evidence of of the , sold by the controversial , to target the phones of Israeli citizens.

The probe was launched in January after theÌýIsraeli news site CalcalistÌý a string of instances ofÌýpolice using PegasusÌýto surveil protesters, politicians and criminal suspects without authorisation from a judge.

Initially, the police denied the website's findings and said they operated according to the law. Outrage in Israel prompted the attorney general to launch an investigation.

Last month, the police announcedÌýthat theirÌýpreliminary internal investigation had found no evidence of misuse of theÌýspyware, but Tuesday's statementÌýsaid that "additional findings" from the internal probe "change in some ways" last month's findings.

Israel's attorney general has instructed the police “to adopt procedures immediately in order to prevent breach of authority" and instructed his fact-finding team to submit a report about allegations of unlawful surveillance of civilians by July 1.

NSO Group has been mired in controversy following revelations its spyware was used in several countries against journalists, activists and even USÌýdiplomats.

The USÌýbarred the firm from accessing American technology last year, saying its tools have been used by repressive regimes, andÌýÌýand Apple have filed lawsuits against NSO over hacks against their products.

Pegasus allows its operatorÌýto interceptÌýcalls, read text messages, infiltrate encrypted apps, and track the location of an infected phone.

It can also turn a mobile phone into a listening device. It has been sold to a number of repressive regimes around the world.