The US has issued a new terror alert warning Americans about travelling to Europe.
The US State Department alert referred to recent incidents linked to terrorism in the UK, France, Russia and Sweden.
"While local governments continue counter-terrorism operations, the department nevertheless remains concerned about the potential for future terrorist attacks," the alert said.
"US citizens should always be alert to the possibility that terrorist sympathisers or self-radicalised extremists may conduct attacks with little or no warning."
