State Minister of Public Administration Forhad Hossain said that scrutinising the CCTV footage, the authorities saw two youths hitting Dinajpur's Ghoraghat Upazila Nirbahi Officer (UNO) Wahida Khanam with a hammer-like object on her head.
"But their faces weren't clear in the footage," the state minister told media on Thursday afternoon.
He made the assurance that police are trying their best to catch the culprits.
"We are working on appointing Ansars in the residences of upazila nirbahi officers to ensure their safety," Forhad Hossain said.
On early hours of Thursday, Dinajpur's Ghoraghat UNO Wahida Khanam and her father were attacked by some miscreants inside their house. They broke into her government residence through ventilator. Their guard was locked into another room.
They were initially admitted to Rangpur Medical College Hospital in critical condition.
However, on Thursday afternoon, the UNO was airlifted to Dhaka by a Bangladesh Air Force helicopter when her health condition started to deteriorate further. She is in critical condition now.