UPDATE 5:03 p.m.:
Trump tweeted Sunday night saying he was referencing a story about immigrants in Sweden that aired on Fox News.
The Associated Press notes that Trump may be referring to a segment that aired Friday on Fox's "Tucker Carlson Tonight." That segment reported that Sweden accepted more than 160,000 asylum-seekers in the last year but many were unable to find jobs. It went on to say that gun violence and rape spiked after the influx of immigrants.
UPDATE 2:17 p.m.:
The Swedish Embassy in Washington has reportedly contacted the State Department, asking for clarification on what exactly President Trump meant when referred to what happened Friday night in Sweden.
Foreign Ministry spokeswoman Catarina Axelsson said the government wasn't aware of any "terror-linked major incidents." The embassy has not heard an answer from the administration yet, The Associated Press reports.
ORIGINAL STORY: During his rally on Melbourne, Fla. on Saturday, President Trump referenced a terrorist attack in Sweden that happened on Friday.
However, no terrorist attack took place Friday in Sweden. There was a suicide bombing in Sehwan, Pakistan on Friday that killed 80 people, according to The Guardian. Some believed Trump had confused the two regions.
Others simply filed in the details of this fictional tragedy, much like the "Bowling Green Massacre."
WATCH | Here's the moment Trump tells his supporters to "Look at what's happening last night in Sweden."
No. Nothing has happened here in Sweden. There has not ben any terrorist attacks here. At all. The main news right now is about Melfest. ->— @sweden / Maral (@sweden) February 19, 2017
An official Swedish Twitter account, run by a different citizen each week, denied it.
Trump's comments come after Fox News aired an interview with filmmaker Ami Horowitz, who made a documentary linking high crime rates in parts of Sweden to the nation's immigration policy, according to the New York Daily News. Sweden accepts more refugees than any European nation except Germany, according to the Pew Research Center.
This is at least the third "incident" entirely fabricated by the Trump administration, including aide Kellyanne Conway making up the "Bowling Green Massacre" and White House Press Secretary Sean Spicer referencing an Atlanta attack.
Twitter jumped at the opportunity to poke fun at Trump's line.
Some referenced Trump's vague comments on Frederick Douglass.
Some got political.
Some decided to show photos of bunnies instead.
Some thought they uncovered the master plans.
Some were charitable anyway.
If you don't get this joke, look up Sweden's flag.
But it got some wondering about the rally's price tag.
Former Swedish Prime Minister Carl Bildt wondered what Trump was smoking.
This incident involving a refugee to Sweden might be what Trump was referring to.