Swedish police arrested a man suspected of planning an attack and said investigations continued. The threat-assessment level was at its highest ever, meaning a high probability "persons have the intent and ability to carry out an attack". Italy's Foreign Minister said attacks could be aimed at St Peter's Basilica in Rome or the cathedral or La Scala theatre in Milan. In Stockholm, police stepped up their presence around the parliament and main railway stations. Both countries were on a high state of alert to guard against any possible attack. Rome's underground train operator temporarily closed lines on three separate occasions during the day due to suspicious packages, which...
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