The arrestees are Yeasin Ali, 30, driver of upazila land office and Arsola Hembram, 38 a cleaner of the Upazila Parishad.
Amirul Islam, officer-in-charge of Ghoraghat Police Station, said they were detained for interrogation in the case filed over the attack on UNO and her father.
Ghoraghat Upazila Nirbahi Officer (UNO) Wahida Khanam and her father Omar Ali were seriously injured in an attack by miscreants at her home on the Upazila Parishad premises early Thursday.
They were taken to Rangpur Medical College and Hospital.
Also read: UNO Wahida’s condition now better, says doctor
Later, the UNO was airlifted to Dhaka by a Bangladesh Air Force helicopter. She is currently undergoing treatment at the National Institute of Neurosciences & Hospital.
Police arrested eight suspects including the prime accused in the case filed over the attack.
Earlier on Saturday, a court in Dinajpur placed two of the accused – Nabirul Islam and Santu Kumar – on a seven-day remand each.