.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}@media all and (max-width:500px){.mw-parser-output .hidden-begin{width:auto!important;clear:none!important;float:none!important))You can help expand this article with text translated from the corresponding article in Italian. (March 2020) Click [show] for important translation instructions.
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At 11am on 17 May 1973, a hand grenade was thrown at Milan's police headquarters in Lombardy, Italy.[1][2] It happened during a memorial ceremony there for police officer Luigi Calabresi, who had been shot dead in Milan a year earlier.[2] Four civilians were killed by the blast and 45 other people were injured.[1]
