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Donald Trump has said Britain and Europe are "not safe places" after terror attacks in Brussels and Paris.

The US Republican presidential front-runner said Europe had lots of “very, very severe” problems and added that he did not even think America was a safe place for Americans.

Mr Trump made the comments five days after the two explosions at Brussels Airport and a blast on the Metro, in which at least 31 people died.

Speaking to ABC, he said: “I don't think Bruss - England or I don't think that Europe is a safe place. No, I don't. I think there are a lot of problems in Europe that are very, very severe.

"When you look at Brussels, when you look at the way they've handled things from law enforcement standpoints, when you look at Paris, when you look at so many other places, no, it's not [safe].”

John Kerry, the US secretary of state, echoed Mr Trump’s comment, telling CBS’s Face The Nation that US citizens should “avoid a crowded place” if they were travelling Europe, because “you have no control over who may be there”.

In December Mr Trump sparked outrage after claiming some areas of London were “so radicalised that the police are afraid for their own lives.”

Mr Trump’s latest comments came as Belgian officials completed their initial investigation at Brussels International Airport and found the main building to be stable.

A statement published on the airport's website confirmed that technicians and independent experts had judged the main and connector buildings to be "intact".

The statement also disclosed that the locations where hand luggage and custom checks are carried out can also be used again.

Airport officials are now discussing plans to install temporary check-in desks, but pointed out that the process of identifying a suitable location was still being carried out in consultation with airlines and luggage handlers.

Additional reporting by agencies.