Stockholm: Sweden's government and parliament said on Monday they received unspecified threats, days after Islamic State (IS) militants rampaged through Paris in attacks that left 129 dead and hundreds wounded.
The authorities did not give details of the nature of the threats, and said the country's intelligence agencies would determine the perpetrators and their credibility.
"The government has received an email containing threats," Bodil Sunden, a government spokesman, told AFP.
A spokesman for the Scandinavian country's legislature, the Riksdag, also said that it had received a threatening letter.
He said Sweden's parliament, close to the royal palace in Stockholm, had not been evacuated.
"We can confirm that a threat to the Swedish parliament has been received," a statement on the Riksdag website read.
According to public broadcaster SVT, the letter to parliament warned lawmakers against going to the Riksdag on tomorrow.
It apparently made reference to the so-called "Stockholm Bloodbath", a series of executions that took place during Denmark's 16th century invasion of Sweden.
Fredrik Milder, a spokesman for the Swedish intelligence agency Sapo, said the threatening letters had specifically referred to tomorrow, but declined to comment further.
The latest threats in Sweden follow Friday's violence in Paris at six locations in and around the city which mark the worst-ever terror attacks on French soil.