A suspected gas leak at the headquarters of Sweden’s security agency Friday forced authorities to evacuate some 500 people from the facility, Swedish broadcaster TV4 said. Seven people from the headquarters in Solna, just north of Stockholm, were hospitalized, police spokesperson Anders Bryngelsson told the TT news agency. Images shared from the scene showed first responders and police officers wearing gas masks, and Swedish media reported that a zone measuring 500 meters (547 yards) in diameter was set up protectively.