LONDON (AP) — U.K. prosecutors say an Islamic State adherent plotted a suicide bombing targeting British Prime Minister Theresa May at her Downing Street office in London.

Authorities say Naa'imur Zakariyah Rahman, 20, thought he was just days away from carrying out the attack before his arrest last November. He was snared in a social media sting by an undercover operative for Britain's security services posing as an Islamic State official in Syria

Prosecutor Mark Heywood told jurors at London's Central Criminal Court that Rahman intended to inflict violence "at the very heart of the United Kingdom government."

Heywood says Rahman's objective was "a suicide attack, by blade and explosion, on Downing Street and, if he could, upon the Prime Minister Theresa May herself."

Rahman has denied two counts of preparing terrorist acts.