The US embassy in Israel issued a security alert for the Palestinian territories on Thursday, amid increased tensions over the Jewish state's plans to annex parts of the occupied West Bank.
The embassy advised its citizens living or travelling in the West Bank or Gaza to "maintain a high level of vigilance" and "increase their security awareness".
"Violence can occur with little or no warning," said the alert published on the embassy's website.
It mentioned checkpoints, markets, tourist sites and transportation hubs among a list of possible targets for attacks, but did not detail a specific threat to a location or to American citizens. "US citizens should carefully consider risks to their personal safety and security when considering visits to sites and events that are potential targets," the embassy added.