The clash erupted after the incumbent Headmaster Belayet Hossain Sikder refused to hand over the charge to former headmaster Mohammad Sabder Ali, who was removed from his post a couple of months ago.

Sabder Ali, who received a court order in his favour, went to the school at around 12.30pm to claim his post.

As Sikder refused to hand over the chair, two groups were locked into an altercation, leading to clashes. Three students -- Sayeed, Mridul and Mamun -- were also injured.

Local people said Sabder Ali had been serving as headmaster much before independence, but that the ex-officio chairman of the governing body of the school forced him to resign three months ago.

Later, Belayet Hossain Sikder, an assistant teacher of the school, took charge of the headmaster with the support from the local MP, they said.

However, duty officer of Mirpur Police Station said no such clashes took place there but that police rushed to the school to avoid any untoward incident and settled the matter peacefully.