The Iraqi government has warned Sweden that the terror group ISIS may be targeting that country’s capital of Stockholm, a senior Iraqi security official told NBC News Tuesday.

The official, who spoke on condition of anonymity, said Iraq found intelligence “about an ISIS plan to target the Swedish capital Stockholm,” involving seven or eight Iraqi citizens who were former members of al-Qaeda in Iraq.

“The government sent [this] information to the Swedish government with details about those who are involved in these plans,” the security official said.

“Those ISIS militants are Iraqis, and were able to arrive to Sweden in 2015 with those thousands who emigrate from different countries to Europe,” the official said.