A gunman killed six people a school in the Russian city of Izhevsk, Russia's interior ministry said in a statement.
The Udmurtia branch of the interior ministry said the gunman had killed himself and that 20 people were wounded.
News agency RIA cited Governor Alexander Brechalov of the Udmurtia region, of which Izhevsk is the capital, as saying that an unidentified man had entered the school and killed a security guard.
He said there were dead and wounded among the school students.
The incident took place at school number 88, which has almost 1,000 pupils and an estimated 80 teachers.
The school is in the centre of Izhevsk, a city of about 650,000, close to central government buildings.
It comes after Foreign Secretary James Cleverly called on countries to reject the “charade” of referenda he said Russian President Vladimir Putin will use to annex swathes of Ukrainian territory and further escalate his aggression.
The Security Council meeting in New York last week followed a threat from Putin that he would use “all the means at our disposal” to protect his homeland.
He also moved to annex Russian-controlled regions in Ukraine, and announced a partial military mobilisation as the Kremlin attempts to regain ground in the face of a counterattack by Ukraine’s forces.
The school is in the centre of Izhevsk, a city of about 650,000 Wiki Commons