He seeks a rare third term on the back of issues such as growth, welfare and Hindu nationalism
"It was an unwarranted incident. Now, it's settled," Kotwali Police Station OC Jasim Uddin told bdnews24.com after releasing Manju on Sunday night.
"We've released him after the victim withdrew his complaint following a compromise," he added.
Police detained Manju on Saturday night after the shooting at the Officer’s Club next to the MA Aziz Stadium.
The victim is local Juba League leader Md Jainal, the younger brother of Chittagong District Council member SM Alamgir. He was being treated at Chittagong Medical College Hospital.
Earlier on Sunday morning, Manju's supporters blocked the Oxygen-Hathazari road at several points to protest against the detention of their leader.
They left the road after police spoke to them around 1am.