Fifty-four people were hurt as police and paramilitary BDR shot at unruly protesters after EC had cancelled the candidacy of a local Awami League leader.
"They (the protesters) rampaged a bus station and damaged shops in the area," said Ukhia police officer in charge Mustafa Kamal.
The EC on Monday announced that Hamidul Huq Chowdhury would not be allowed to run for Ukhia Upazila chairman on grounds of loan default.
Police and witnesses said the protesters were trying to storm the local Upazila complex.
"Some 54 people were hurt, at least four of them sustaining bullet injuries, in clashes between the protesters and members of BDR, police and Ansar," said the OC.
The incident forced all transport to a halt on the Cox's Bazar-Teknaf highway until 5pm.