RNC officers are looking to speak with anyone who witnessed two separate assaults on George Street at about 4 a.m. July 21.
In one, two women were involved in an incident outside Onyx nightclub.
The other assault involved two men and also happened outside Onyx.
That incident left one man with serious but non-life threatening injuries, report the RNC.
Police are asking anyone with information to call the RNC at 729-8000 or Crime Stoppers at 1-800-222-TIPS(8477).