At least one person has been killed and three others injured in a shooting incident at a school in southern Finland, local media reports.
Police gave no details of the victims' injuries in the incident in the town of Tuusula, some 50km (30 miles) north of the capital Helsinki.
Finnish media reported that the shots had been fired by an 18-year-old man who is thought to be inside the school.
The building has now been surrounded by police and ambulances are on standby.
A Tuusula municipality spokesman said the gunman opened fire during a lesson, Finland's STT news agency said.
Students and staff fled in panic, and a number of heavily armed police were later seen rushing to the scene, STT said.
Some media reports suggested a message on the You Tube website was linked to the shooting.
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