The killings of Shamsul Haq and his son Russell Sheikh came to light two days after police found their driver hacked to death in Dhamrai, about 50 kilometres off Dhaka, in the first signs of the macabre incident that underlined security fears of businesspeople.

The 56-year-old and his 29-year-old son went missing after they left home with Tk 2 lakh on Friday after a phone call from Kajal, a close family friend and business partner, accused as the prime suspect in a case filed with Sutrapur Police Station.

Kajal is evading capture, but police arrested a man locally known as Kuttu in Sabujbagh with potential links to the killings.

"How can a human kill another in such a way? It's a bestial act," Russell's sister Yasmin said of the murders that numbed their family.

Locals found two sacks filled with parts of chest and stomach at Bhograo near Dhaka-Mymensingh Highway shortly before 7:00am and alerted police.

Two hours later and eight kilometres off the scene of the first recovery, police retrieved two skinned heads and four severed wrists in a pack at Nanduail Eidgah field.

Witnesses said four legs from the knee down were found in Bimbazar -- half a kilometre from Nanduail -- and four pairs of gloves and scraps of human flesh were discovered wrapped in layers of newspaper and polythene and duct-taped in two large travel bags at Bhawal National Park.

Police pieced together the body parts and facial skins and matched them with the newspaper pictures of Haq and Russell.

The assembled human remains were sent to Gazipur Sadar Hospital for autopsy and informed the victims' family in Dhaka. In-laws of Haq and Russell identified the bodies on the afternoon.

Back in Dhaka, police retrieved frozen upper thighs of the father and the son in two large bags from the sidewalk of a Dhanmondi road at about 4:00pm.

Earlier, 19 pieces of their bodies were recovered from two locations in Dhanmondi hours after the body of driver Moazzem was found in the rear seat of a car in Dautia village near Dhamrai Police Station at 11:30pm Friday.

SUSPICION AND PROTEST

Police seized movable property of Kajal from his house in the old quarter of the city after the case was filed against him as the main accused.

Kajal, an activist of the Jatiyatabadi Jubo Dal, youth front of the ruling BNP, is also accused of killing police sergeant Farhad on Jagannath University College campus.

Over 1,000 businesspeople from 36 markets at Sadarghat flocked to the Kazi Abdur Rouf Lane home of the bereaved family to offer condolences and vowed to avenge the savage killings.

They marched in procession through Sadarghat, which ended up in a rally back in Kazi Abdur Rouf Lane, demanding trial of the killers by a speedy tribunal.

The demonstrators blamed the government for neglecting their security concern triggered by the murder of another businessman, Selim Reza, two weeks ago.

"We pay the government tax. Why can't police provide security for us?" asked Mohsin Gazi, vice-president of Bangladesh Dokan-Malik Samity, an association of shopkeepers and shop owners.

The businesspeople sit at 10:30am today to announce their plan of action after Leader of the Opposition Sheikh Hasina visits the bereaved family.

Mayor and local lawmaker Sadeque Hossain Khoka visited Haq's wife and daughters to convey his condolences and assured them of bringing the killers to justice.

Promising the family security in the days to come, Khoka ordered immediate deployment of police in and around the area, hotbed of attacks on businesspeople and businesses.

Later in the day, Awami League Organising Secretary Saber Hossain Chowdhury visited Haq's family and said: "The deaths over the years have become mere statistics."

"Shamsul Haq was an active AL member and we are not sure of justice as the main accused is a mid-level BNP member." Haq was an advisor to AL's Louhojang upazila unit in Munshiganj.

Accompanied by former mayor Mohammad Hanif's son Sayeed Khokon, Saber led a protest procession in the neighbourhood.