The front door of the Turkish Embassy located in the Kaivopuisto area of Helsinki was set on fire around 3 a.m. on Tuesday morning. Police say it's possible the arson was politically motivated.
A bottle containing flammable liquid was likely thrown at the embassy building, say police. The incident is being investigated as a case of vandalism.
"The embassy's door was substantially burned. By the time the rescue department arrived to put out the flames, the fire had spread to the building's interior," told Jussi Huhtela, the commissioner on duty, to YLE.
A Kurdish demonstration was staged by the Turkish Embassy on Monday.
Four young men have been brought into custody as suspects.
"These are very young men in their 20s. They all live in Finland, but at least some of them are of Kurdish-Turkish background."
The suspects have yet to disclose any motive.
One of the embassy workers inhaled smoke and was taken in for a medical check-up.
Police have stepped up security around sites owned by the Turkish Republic in the city.