Dhaka Metropolitan Police (DMP) commissioner Shafiqul Islam on Tuesday said an investigation into the navy officer assault case will be conducted without any biasness.

"No one will try  to influence here. He (Haji Selim's son) will be put on trial like other criminals," he said.

The DMP commissioner came up with the remarks at a program at Tejgaon police station compound on Tuesday.

Lieutenant Wasif Ahmed Khan of Bangladesh Navy filed the case with Dhanmondi Police Station naming four people and several unnamed others.

According to the case statement, a private car hit Lt Wasif's bike near Labaid Hospital at Dhanmondi around 7:45pm when he and his wife were returning to their Mohammadpur residence from Nilkhet.

Later, some people came out of the car and physically assaulted the navy officer and verbally abused his wife.

Rab arrested Irfan from his father’s residence at Devdas Lane of Swarighat in Old Dhaka on Monday afternoon.

A mobile court of Rapid Action Battalion (Rab) on Monday sentenced Irfan Selim, son of Dhaka-7 MP Haji Selim, and his bodyguard, Zahid, to one-year in jail for possessing illegal walkie-talkies and liquor.

Detectives arrested another associate of Irfan Selim from Tangail district early Tuesday in a case filed in connection with the assault on an official of Bangladesh Navy in the capital on Sunday night.

A team of Detective Branch of Police arrested Irfan’s associate AB Siddique, 45, from Tangail around 3:30am, said Walid Hossain, deputy commissioner (media) at the Dhaka Metropolitan Police (DMP).

With his arrest, all the named accused in the case, including Irfan, are now behind bars.

The other arrestees are Md Zahid and driver Mizanur Rahman.

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