A woman was killed and three others, including her husband, were injured in an attack allegedly carried out by a local union parishad (UP) chairman and his men in Meghna upazila on Friday night.
The deceased was identified as Nazma Begum, 55, wife of Abdus Salam.
The injured are Abdus Salam, his elder brother Sirajul Islam and Faruk, a local youth.
Of them, Salam and his brother Sirajul were shifted to Dhaka Medical College Hospital early yesterday as their condition deteriorated, Officer in Charge of Meghna Police Station Abdul Majid said.
Meanwhile, police detained one of the attackers Delwar Hossain from Raipura area in Munshiganj's Gazaria upazila yesterday noon, Senior Assistant Superintendent of Police (ASP) Fazlul Karim said.
Locals said Bhaorkhola Union Parishad (UP) Chairman Faruk Abbasi and his supporters have been extorting money from them and conducting other criminal activities in the area for a long time.
They also alleged that Chairman Faruk and his men attacked the family around 7:30pm on Friday night.
After the attack, police raided the houses of Faruk Abbasi and his brothers Khokon Abbasi, Yar Abbasi and Imran Hossain Titu on Friday night and seized huge amount of locally made lethal weapons from there, the ASP added.
Meghna Upazila Chairman Saifullah Sikder Ratan, also general secretary of the upazila unit Awami League (AL), said there are several allegations, including murder and extortion, against Baharkhola UP chairman.