An updated travel advisory for Italy cites terrorism threats and petty crime such as pickpocketing on public transportation in popular tourist locations.
https://www.foxnews.com/travel/us-warns-americans-stay-vigilant-terror-risk-looms-major-vacation-hot-spot
https://www.foxnews.com/travel/us-warns-americans-stay-vigilant-terror-risk-looms-major-vacation-hot-spot