Miami police say four armed men with white bandannas covering their faces opened fire at a party, killing two people and injuring five others.
Authorities say the shootings early Sunday morning are believed to be gang related.
About 300 people were attending the graduation and birthday party that began Saturday night and continued into the early morning at the Polish American Club in Miami.
Police say the four gunmen entered the party around 1 a.m. Sunday and began arguing with people.
It's believed a 16-year-old and a 20-year-old died inside the rented hall. The other injured guests were taken to hospitals.
A club employee said he saw party guests ducking and hitting the ground when the shooting started. He says chairs were flying in the air and people were screaming.