Police on Monday night arrested one of the accused in a case filed for throwing acid on three people, including two women of a family, in Gopalpur village in Sadar upazila on Saturday night.
  Md Babu, 20, son of Amjad Ali of Harinakundu upazila of Jhenidah is one of four accused in the case field by Ayub Ali.
Mir Shariful Haq Janak, officer in-charge of Islamic University Police Station, said a team of law enforcers raided the house of one Baten Ali at Gopalpur village around 10:00pm and arrested Babu.
Babu, a second-year student at Jhoudia College near the village, is a nephew of Baten and had been staying at Baten's house for the last few years to carry out studies.
During primary interrogation, Babu gave us some vital information regarding the acid attack. However, he denied his direct involvement with the incident, he added.
Criminals threw acid on Ayub's daughter Sonia, 20, son Titumir, 13, and widowed sister Saleha while they were asleep on Saturday night.
 Sonia, a second-year student of Jhoudia College, who sustained burn injuries on her face and left hand, is now undergoing treatment at Rajshahi Medical College Hospital, while her brother Titumir is being treated at Dhaka Medical College Hospital.
According to police, there had been a longstanding conflict between two local Awami League leaders--Swapan Biswas and Golam Mostafa--over establishing supremacy in the area.
Police suspected the incident was a sequel to the longstanding feud between the rival groups.  
Following the acid attack on his children, Ayub Ali, a supporter of Swapan, filed a case with Islamic University Police Station, accusing 8 people in this connection on Monday afternoon.