Plainclothes men picked up six people from different villages in Sadar and Kotchandpur upazilas of the district during the last two weeks.
The victims are Rezaul Islam and Ibrahim Gazi of Kashimnagar village in Jhenidah Sadar, Humayan Kabir, principal of Kotchandpur Poura College, Anarul Islam of Chandpara village, Imrul Islam of Jalalpur village, and Alam Khan of Balabaria village in Kotchandpur upazila.
Humayan Kabir was later freed, Anarul Islam was shown arrested after a week, while four others have remained traceless.
"At 11:00am on March 29, some plainclothes men reached Kotchandpur Poura College and called Principal Humayan Kabir out. Then they took him into a microbus and left the scene," said Md Tazul Islam, a teacher of the college.
The principal was left blindfolded in Pagla Kanai area of Sadar upazila on Saturday midnight, he said.
Anarul Islam alias Mukul was abducted on March 24 night from his house at Chandpara village and he was shown arrested in a drug related case with Kotchandpur Police Station on March 30, family members said.
"After the abduction, a caller from an unknown mobile number claimed Tk 1.50 lakh. As we failed, they claimed Tk 1 lakh and later brought down the demand to Tk 50 thousand. But we could not pay the amount and lastly he was shown arrested," said Anarul's uncle Sirazul Islam Qari.
Ripon Hossain, son of Rezaul Islam, said some 15/20 men in two microbuses reached his house on March 22 midnight and called him out.
"As my father wanted to know who they are, they claimed to have come from the police station and asked him to show them the location of an accused. Then they took my father away and he did not return.
"On information from a local, we went to Barobazar police camp on March 26 and saw my father confined there. But when we went there the next day, he was not found there and he has remained traceless since then," he said.
Champa Khatun, wife of abducted Imrul Hossain, said, "On March 22 midnight, 7/8 plainclothes men called my husband. Saying that he was being taken for knowing the location of an accused, they took him in a microbus. Since then he is traceless."
"We went to file a GD with Kotchandpur Police Station but police did not accept it," she said.
Ibrahim Gazi and Alam Khan were abducted from their areas on March 22 and March 28 respectively and they too remained traceless, said family sources.
Ajbahar Ali Sheikh, additional superintendent of police in Jhenidah, said, "The police are not involved with the alleged abductions. They are trying to find out the missing ones."