A fight involving 75 people broke out early Tuesday morning in Elmwood Place near Cincinnati.
At least seven police jurisdictions had to be called in to get the large brawl under control, according to the Elmwood Place police chief.
Police say 150 people were attending a 3-year-old's birthday party at the Fraternal Order of Eagle's Hall when a fight broke out shortly after the ex-husband of one of the women in attendance showed up around 1:15 a.m.
That ex-husband confronted his ex-wife's new boyfriend and the party got physical, according to police.
Fifteen people were injured in the clash with at least five of those hospitalized, including one person who required surgery due to a cut from a beer bottle.
Police say beer bottles were the primary weapons used in the melee and that four people were detained. All four likely face charges, but police have not released their names or those charges.
A total of 20 officers responded to the scene and police believe a majority of those involved were heavily intoxicated.
Police say the Eagle's Hall was being rented out and their membership was not involved.