Four teenagers have been charged in connection with an alleged bias attack in Queens that claimed the life of an 18-year-old man.

Police say it all began around 12 a.m. Saturday after five teenagers crashed a birthday party that had been advertised on Facebook on 90th Street in Woodhaven.

Once inside, investigators say the teens smashed windows and yelled anti-gay slurs while flashing gang signs.

They then chased Anthony Collao, 18, as he was leaving the party and beat him with a pipe.

Collao was put on life support, but died Monday at Jamaica Hospital.

The host of the party, who did not want his identity released, tells NY1 that while the suspects were not invited, they are known in the neighborhood.

He also says while he himself is gay, Collao was not and doesn't understand why he was attacked.

"They refused to pay, they pushed their way in, they started making homophobic remarks and the victim and his companion left the party and apparently they were standing in front of the location when they were accosted by these five individuals who pushed their way into the party," said Police Commissioner Ray Kelly.

A neighbor who heard the commotion tells NY1 he called police but says he did not hear any anti-gay slurs during the attack.

"I was in bed and I heard a lot of raucous outside, a lot of kids running around knocking on trash cans and breaking glass. I figured it was just a bunch of punk kids from the park, typical Friday night stuff, nothing unusual," said Witness Erol Bal. Then I started hearing a lot of cursing, a lot of, 'Get that mother f----r' and hearing a lot of complaints like that. Basically I heard a lot of shouting. I looked outside the window and saw a group of individuals through the window basically pretty much attacking the gentleman. I didn't get a good look at anyone. I wound up calling the police."

Court papers identify the suspects as Luis Tabales, 16, Alex Velez, 16, Christophe Lozada, 17 and Nolis Ogando, 17.

They are being held on bail and face charges of gang assault, manslaughter and criminal possession of a weapon.

As of late Tuesday, police were still looking for a fifth suspect.

The hate crime task force is involved in the investigation.

Anyone with information about the case is being asked to contact Crime Stoppers by calling 1-800-577-TIPS, by texting TIP577 to CRIMES, or by going to NYPDCrimeStoppers.com.