Sweden's security service said Tuesday it is "working to assess information" after Swedish media reported that Iraqi authorities had told the agency about alleged Islamic State militants who were reportedly planning a terror attack in Stockholm.
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The Expressen daily said Iraqi authorities had informed Swedes that "seven or eight terrorists" from ISIS had traveled to Sweden. The daily, quoting unidentified sources, added that the security service, known as SAPO, had sent people to Iraq to obtain more information.
In a statement, SAPO said Tuesday that action had been taken but didn't elaborate. Swedish media say security at train stations and airports has not been tightened.
Swedish media is also speculating that the celebrations Saturday for Sweden's King Carl XVI Gustaf's 70th birthday could be a possible target. Such an event gathers the royal family, government officials and European royal visitors.
Swedish court spokesman Daniel Urso declined to comment on security issues. No guest list has yet been released for the birthday celebration.