A prank caller managed to get through to British Prime Minister David Cameron on Sunday, prompting a security review at 10 Downing Street.
The caller claimed to be Robert Hannigan, the director of the Government Communications Headquarters (GCHQ), a U.K. intelligence agency, according to the Guardian.
Another hoax was reported on Sunday when a caller managed to reach GCHQ and obtain the phone number of Hannigan.
A government spokeswoman said “Following two hoax calls to government departments today, a notice has gone out to all departments to be on the alert for such calls.”
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The spokeswoman added that the phone call was “quite brief” and no sensitive information was disclosed.
Mr. Cameron has been duped before. In 2013 he tweeted at a spoof account for work and pensions minister, Iain Duncan Smith, without apparently realizing the account was a fraud.
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