Indian Border Security Force (BSF) shot dead a Bangladeshi cattle trader along Burimari border in Patgram upazila of Lalmonirhat on Saturday.
The victim was identified as Babul Hossain, 31, of Islampur village in the upazila.
Helal Uddin, camp commander of Border Guard Bangladesh (BGB) 31 Battalion, said a BSF patrol team of Changrabandha camp of Cooch Behar opened fire on Babul around 9:20pm when he went there to receive cattle smuggled in from India.
The BSF later took the body, he added.
The BGB in a letter to the BSF demanded the return of the body. The BSF said it would hand over the body after an autopsy, said BGB officials.