Arrests made after birthday party brawl

A number of people have been arrested over a brawl at a children's birthday party at Lollipops Playland in Sydney's west last month.

A seven-year-old girl's hair was allegedly pulled by a grown man, reportedly sparking the fight between men who were celebrating separate children's birthdays with their families in Wetherill Park on June 20.

Police say they will release more information on Tuesday after they executed search warrants across southwest Sydney earlier in the morning.