An SSC examinee was hacked allegedly by her cousins over a land dispute at Maizhati village in Ishwarganj upazila of the district.
The victim is Mitu Akter, 15, a Secondary School Certificate (SSC) examinee from local Madhupur High School in Ishwarganj.
There was a longstanding conflict between Mitu's father Ruhul Amin and his elder brother Nurul Islam over the land, said Badrul Alam Khan, officer-in-charge of Ishwarganj Police Station.
Following the dispute, Nurul's sons -- Ripon Mia and Rimon Mia -- locked in an altercation with Ruhul at their homestead on Tuesday noon.
At one stage, Ripon and Rimon chased Ruhul with sharp weapons, said the OC.
Hearing the scream, when Mitu rushed to the spot to save her father, the duo hacked her, leaving her seriously injured. Mitu was taken to Mymensingh Medical College Hospital, he said.
A case was filed with Ishwarganj Police Station, accusing six people, including Nurul and his sons --Ripon and Rimon.
Police arrested Nurul, Ripon and Rimon early yesterday, said the police official.