ROME—Italian prosecutors say a top World Health Organization official lied to them about a spiked WHO report into Italy’s coronavirus response, revealing private communications Friday that are likely to embarrass the U.N. health agency. Prosecutors in Bergamo placed Dr. Ranieri Guerra, at the time a WHO assistant director general, under investigation for allegedly making false declarations to them when he voluntarily agreed to be questioned in November. Guerra was the WHO’s liaison with the Italian government after Italy became the epicenter of the COVID-19 outbreak in Europe last year. They have not charged Guerra with any crime, outlining their allegations in an interim investigative document sent to the Italian foreign and justice ministries that listed him as one of six people under investigation in their probe. Guerra did not immediately respond to an email seeking comment. The Agi news agency quoted him as saying he was shocked and “deeply embittered” …