Turkish media report says suspected Kurdish militants hurled a hand-made explosive device at a middle school in the mainly-Kurdish city of Diyarbakir on Friday, injuring five students.

The Dogan news agency says that the attack targeted the Celebi Eser middle school in Diyarbakir’s Baglar district on the last day of school when students receive their report cards before a winter break.

All five students were hospitalized but none of them is in serious condition.