The US embassy in Brussels was evacuated while police investigate a suspect vehicle, officials and police said.
"I can confirm we have been evacuated. There was a suspect vehicle," said Viktor Sidabras, the spokesman for the US mission to the European Union.
Belgian news agency Belga said police closed several main routes out of the city and sealed off a security zone around the embassy
More top news
The anti-war President is now in combat in two Middle Eastern countries.
Prince Harry received a great big hug from four-year-old Carson Hartley.
The mother of "bucket list" cancer patient Stephen Sutton has said signs of her son's illness were "ignored".