Several people were injured on Friday at a Swedish high school by a person armed with a sword, the Fagersta municipality in central Sweden said in a statement.

"A call was received regarding a case of ongoing deadly violence at a school in Fagersta. Police have responded to the scene and one person has been taken into custody," the police said in a statement.

"Police are continuing to work at the scene with a number of different resources. The public is urged to respect the roadblocks and listen to police instructions."

The government is in close contact with the police following the attack, Justice Minister Gunnar Strommer said in a statement to Reuters.

"We have been informed of a serious incident in Fagersta. The police are on site and working very intensively with the incident," Strommer said.

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