During 2015 alone, Sweden received more than 160,000 asylum applications, resulting in the country closing its internal borders in an attempt to stagger the levels of migration into the country.
And more than 3,000 migrants are still living illegally in the Swedish capital alone.
Stefan Lofven pledged to change Sweden’s liberal attitudes to immigratio
But now Stefan Löfven has pledged to change Sweden’s liberal attitudes to immigration, and insisted the massive influx would never be allowed to happen again.
It comes after migrant Rakhmat Akilov from Uzbekistan drove a stolen 30-tonne truck into pedestrians at a busy department store in Stockholm on Friday.
Four people were killed in the Stockholm attack on Friday
At lest 15 were injured when the truck ploughed into the department store
Four were killed, including Britton and father-of-two Chris Bevinton, and 15 injured in the harrowing attack, which showed clear similarities to the London terror attack last month.
Akilov is believed to have carried out a reconnaissance of his route just days earlier.
The failed asylum seeker had been given four weeks to leave Sweden in December after his final appeal failed.
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The Stockholm Terror attack – in pictures
Fri, April 7, 2017
The vehicle drove into crowds on Drottninggatan (Queen Street) – one of the city's major pedestrian streets, just before 3pm local time, before crashing into Åhlens Mall
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Truck rams into crowds in central Stockholm
But he managed to evade detection simply by giving the authorities a fake address.
Now Mr Löfven has pledged to crackdown on illegal immigration – vowing to deport migrants who’s asylum applications fail immediately.
He said: “Sweden will never go back to the [mass migration] we had in autumn 2015, never.
Sweden opened their borders to migrants at first
Rakhmat Akilov from Uzbekistan drove a stolen 30-tonne truck into pedestrians
“Everyone who has been denied a permit should return home.
“This makes me feel enormously frustrated. If you have been denied a visa you are supposed to leave the country.”
Akilov, 39, had previously expressed support for Islamic State – telling police he carried out the attack on their orders.
Swden had to close its borders to prevent illegal immigration
He also reportedly told officers he was “pleased with what he had done” and had “accomplished what he set out to do”.
Police added a bomb, which was found in the truck after the attack when it failed to detonate, contained gas canisters, chemicals and nails.
Mr Löfven added: “Terrorists want us to be afraid, want us to change our behaviour, want us to not live our lives normally, but that is what we're going to do.
“Terrorists can never defeat Sweden, never.”