Israeli police and the Shin Bet security agency launched an investigation after threatening leaflets suspected of originating in Iran were found in residents’ mailboxes in northern Tel Aviv on Monday, Israel's Kan News reported. The leaflets contained QR codes linking to the website of the pro-Iranian hacking group Handala, which warned Israel against attacking energy infrastructure, power plants, refineries and desalination facilities belonging to Iran and its allied groups. “This is a final warning,” the hackers wrote, according to Kan, which cited Iranian media reports that Handala had taken responsibility for distributing the leaflets. Police said officers from the Yarkon district visited the locations where the leaflets were discovered and collected evidence. Authorities urged residents who find similar leaflets to report them to the police emergency hotline.