Swedes have been scratching their heads and ridiculing U.S. President Donald Trump's remarks that suggested a major incident had happened in the Scandinavian country.

During a rally in Florida on Saturday, Trump said "look what's happening last night in Sweden" as he alluded to past terror attacks in Europe. It wasn't clear what he was referring to and there were no high-profile situations reported in Sweden on Friday night.

Trump said in a tweet Sunday afternoon that his statement was in reference to a story that was broadcast on Fox News concerning immigrants and Sweden.

My statement as to what's happening in Sweden was in reference to a story that was broadcast on <a href="https://twitter.com/FoxNews">@FoxNews</a> concerning immigrants & Sweden. —@realDonaldTrump

The comment at the rally prompted a barrage of social media reaction on Sunday, with hundreds of tweets, and a local newspaper published a list of events that happened on Friday that appeared to have no connections to any terror-like activity.

Foreign Ministry spokeswoman Catarina Axelsson said that the government wasn't aware of any "terror-linked major incidents." Sweden's Security Police said it had no reason to change the terror threat level.

What happened in Sweden Friday night? Did they catch the Bowling Green Massacre perpetrators? —@ChelseaClinton

'Questions abound'

"Nothing has occurred which would cause us to raise that level," agency spokesman Karl Melin said.

Axelsson told The Associated Press that the Swedish Embassy in Washington contacted the U.S. State Department on Sunday to request clarification of Trump's remarks and was waiting for an answer.

Former Swedish foreign minister Carl Bildt tweeted, "Sweden? Terror attack? What has he been smoking? Questions abound."

Sweden? Terror attack? What has he been smoking? Questions abound. <a href="https://t.co/XWgw8Fz7tj">https://t.co/XWgw8Fz7tj</a> —@carlbildt

Addressing Trump in an article on Sunday, the Aftonbladet tabloid wrote, "This happened in Sweden Friday night, Mr President," and then listed in English some events that included a man being treated for severe burns, an avalanche warning and police chasing a drunk driver.

Most recent extremist attack in 2010

One Twitter user said, "After the terrible events #lastnightinSweden, IKEA have sold out of this" and posted a mock Ikea instruction manual on how to build a "Border Wall."

After the terrible events <a href="https://twitter.com/hashtag/lastnightinSweden?src=hash">#lastnightinSweden</a> , IKEA have sold out of this: <a href="https://t.co/Bs1XI7ffKG">pic.twitter.com/Bs1XI7ffKG</a> —@JeannaLStars

Sweden, which has a long reputation for welcoming refugees and migrants, had a record 163,000 asylum applications in 2015. The country has since cut back on the number it annually accepts.

Its most recent attack linked to extremism happened in the capital, Stockholm, in December 2010. An Iraqi-born Swede detonated two explosive devices, including one that killed him but no one else.

At the rally, Trump told his followers to look at what was happening in Germany, where a truck attack at a Berlin Christmas market killed 12 people. He also mentioned Paris, Brussels and Nice, in apparent reference to the terror attacks there.

'Who would believe this, Sweden'

The president didn't specify what was supposed to have happened in Sweden, simply saying "Sweden, who would believe this, Sweden."

Over the past few weeks, Trump counsellor Kellyanne Conway has also referred to a "Bowling Green Massacre" that never occurred, and she was caught up in a public feud with CNN.

Sweden stood with us after Bowling Green. Today we stand with Sweden. —@Shteyngart

Former foreign minister Bildt told Swedish Radio after his initial confounded tweet Sunday that he sees danger in how Trump relates to facts.

"If we are in a situation where there is tension in the world, we stand between war and peace," he said. "If we then have a president who spreads lots of false rumours, it can be truly dangerous."