The victim is identified as Shaidullah Liton, 27, president of Sonamukhi Municipality JCD unit and son of Md Hanaif of the municipality here.
Sonamukhi Municipality BNP President Motaher Hossain Manik said a group of unidentified assailants picked Shaidullah from in front of his home in the municipality around 11:30 pm.
Later, the assailants beat him silly after tying his face with his t-shirt and finally left him in the area after shooting him in his right leg.
Locals took him to Noakhali General Hospital in a critical condition, Manik added.
Abdul Mojid, officer-in-charge of Sonamukhi Police Station, said he had no information in this regard yet. Necessary legal steps would be taken after receiving a written complaint.