The National Rugby League will investigate three key aspects of last night’s Manly v Melbourne match.

The first is the on-field issues that the NRL Match Review Committee will examine as part of their weekly procedures starting Monday morning.

The second relates to the NRL’s Football Operations Guidelines in regards to the sideline benches and how players and officials must conduct themselves.

The third relates to the overall conduct of the clubs involved.

"I can understand that everybody is concerned with what occurred last night and it is important that it be looked at in the appropriate manner," NRL Chief Executive, Mr David Gallop, said.

"Clearly this is serious and unacceptable. No one wants to see protracted fighting and the NRL has processes in place to deal with these issues.

"The Match Review Committee will begin its deliberations on Monday morning and the NRL Football Department has already begun its own investigations into the other aspects of last night’s events.

"The NRL will also review the conduct of both clubs and it is important that everyone respects the need for these processes to be completed."