Police on Sunday night arrested three people from Ali Mor area in Uttar Badda in connection with the lynching a woman on Saturday following a child-lifting rumour.
The arrestees are MdBacchu Mia, 28, MD Bappi, 21 and MD Shaheen, 31.
Al Imran, duty officer of Badda Police Station, said that police arrested the trio from the area after reviewing a video clip of the incident.
On Saturday, Taslima Begum went to Uttar Badda Govt Primary School to collect information about her daughter's admission there.
She was taken to the head teacher of the school for interrogation while a rumour spread outside about a child lifter had been held. Later she was dragged out of the school by a mob and then beaten mercilessly.
On information, police rescued critically injured Taslima and took her to Dhaka Medical College Hospital where doctors declared her dead.
Taslima hailed from Raipur upazila in Laxmipur and was living with her daughter and mother in the capital. She was separated from her husband two years back. Taslima has an 11-year-old son who has been living with his father in Badda area.