The decomposed bodies of an elderly man and his wife have been found at their house in Shakchar area of Laxmipur Sadar upazila.
The deceased were Abu Siddique, 75, and his wife Aktarunnessa, 65. They had no children of their own but had a foster child who lived with his in-laws.
Deceased Abu Siddique's nephew Abdul Hanna said neighbours smelt a bad smell from his uncle's house at night and peeped through the window. They found the bodies lying on the bed and informed police.
Later, police recovered the bodies breaking open the door at 11:30pm.
Superintendent of Laxmipur police Md Mahfuzzaman Ashraf said the door was locked from inside. Police team entered the house breaking open the locked door and found the bodies. Their necks were wrapped with pieces of clothes.
"The bodies have been sent for post-mortem. We suspect someone strangled them to death. Efforts are on to identify and arrest the accused," he said.