CERT-In has started its probe in the Apple threat notification issue raised by opposition MPs, and a notice has been sent to the company, IT Secretary S Krishnan said on Thursday.

He hoped that Apple would cooperate with the investigation by CERT-In on the issue.

"CERT-In has started its probe... they (Apple) will cooperate in this probe," Krishnan told reporters on the sidelines of an event related to the Meity-NSF research collaboration.

Indian Computer Emergency Response Team or CERT-In is the national nodal agency for responding to computer security incidents as and when they occur.

Asked if a notice has been sent to Apple, the IT Secretary answered in the affirmative.

Several Opposition leaders on October 31 claimed they have received an alert from Apple warning them of "state-sponsored attackers trying to remotely compromise" their iPhones and alleged hacking by the government, a charge IT Minister Ashwini Vaishnaw rejected but assured a thorough probe.

Those who received such notifications included Congress chief Mallikarjun Kharge, party leaders Shashi Tharoor, Pawan Khera, K C Venugopal, Supriya Shrinate, T S Singhdeo and Bhupinder S Hooda; Trinamool Congress MP Mahua Moitra, CPI(M) general secretary Sitaram Yechury and SP chief Akhilesh Yadav.

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