A man was killed in sleep allegedly by his younger brother in Vakum Fakirpara village under Singaire upazila of Manikganj on early Monday.
The deceased is Abu Raihan, 27, son of Shahjahan Fakir of Vakum Fakirpara village under the upazila.
According to family members, Roman, 24, the younger brother, slit Raihan's throat while he was asleep minutes after midnight past Sunday.
Family members rescued and rushed Raihan to upazila health complex where the duty doctor declared him dead.
Roman might have killed his brother over family dispute and fled immediately, said Syed Mizanur Islam, officer-in-charge of Singair police station.
The body was sent to the morgue of Manikganj General Hospital for an autopsy, said the OC.
