Iranian diplomats burned documents early Thursday, hours before they were to leave Albania after it cut diplomatic relations with Iran, accusing Tehran of a major cyberattack in July.
In a rare video address on Wednesday, Albania's Prime Minister Edi Rama said he had ordered Iranian diplomats and staff to close the embassy and leave the country within 24 hours.
Rama said the July cyberattack has "threatened to paralyze public services, erase digital systems and hack into state records, steal government intranet electronic communication and stir chaos and insecurity in the country."
Rama said an investigation determined that the cyberattack wasn't carried out by individuals or independent groups, calling it “state aggression.”
A Reuters witness saw a man from inside the embassy throwing papers in a rusted barrel, with flames illuminating the walls of the three-story embassy.
Washington promised to "take further action to hold Iran accountable for actions that threaten the security of a US ally."
In a statement, the White House said it has had experts on the ground for weeks helping Albania and had concluded Iran was behind the “reckless and irresponsible” attack and subsequent hack-and-leak operation.
Tehran has strongly condemned Tirana's decision to cut its diplomatic ties calling as "baseless claims" Albania's reasons for the move.
Albania and Iran have had tense relations since 2014, when Albania accepted some 3,000 members of the exiled opposition group People's Mujahideen Organization of Iran, also known by its Farsi name Mujahideen-e-Khalq, who have settled in a camp near Durres, the country's main port.
Days after the cyberattack Tirana based media have reported that hackers have published personal data of the opposition members that were saved in Albania's state computers such as personal, social and security numbers, names and photos.
On Thursday morning, it appeared calm outside the embassy in Tirana located just 200 meters away from the prime minister's office.
A black Audi with diplomatic car plates and darkened windows was seen going in and out as a police officer guarded the entrance.