Kings County gang task force investigators and Hanford Police arrived at a party at a home on Cameron Street at about 11:30 on Friday night.
Police say they uncovered a dozen weapons including a machete.
Detectives also found three children closed off in a back bedroom littered with dog feces.
The children told officers -- a 16-year-old who was supposed to watch the children was responsible for throwing the party. He has been charged with child endangerment.
Fifty people were given citations for underage drinking. One of them -- according to police -- was only 11-years-old.