Donald Trump backtracked last night after he appeared to blast a terror attack in Sweden that never happened - insisting he got it from Fox News.

The President told a bizarre campaign rally on Saturday, just four weeks into his presidency: "You look at what's happening last night in Sweden.

"Sweden. Who would believe this? Sweden. They took in large numbers. They're having problems like they never thought possible."

But no terror attack happened in Sweden on Friday night.

In fact, the only recent terror incident in Sweden led to the January arrest of three men who targeted a Gothernberg Asylum centre for a homemade bomb attack which seriously injured one man.

The three men were part of the neo-Nazi Nordic Resistance Movement, which openly promotes racist, anti-immigration and anti-Semitic views.

The billionaire's baffling comments spawned the spoof hashtags #JeSuisIKEA and #IStandWithSweden while users checked on the safety of ABBA.