An impromptu house party devolved into chaos when a verbal dispute led to the shootings of seven teenagers.The shooting victims are all expected to recover from their injuries, Houston police spokesman Victor Senties said Sunday.The party was an "instant house party" organized on Snapchat, a detective told CNN affiliate KHOU. In an "instant party" situation, invitations are sent at to random users. "It was just a random group of people receiving an invite" on the messaging app, the detective said.Senties told CNN the melee started after a verbal fight between a few partygoers in the east Houston house early Saturday morning.People who live in the neighborhood told KTRK they heard between 20 and 25 gunshots.Witness Carlos Ramirez noticed a woman had been shot in the hand and called her an ambulance."I came outside and I heard this lady crying and she was yelling on her phone so I peeked and looked and the gunshots were going on. I told her to come inside and wash her hands because you don't know if the people are still out there," said Ramirez. Police believe about 30 to 100 people were at the late-night party when three people started firing shots into the street or inside the home, Senties said. By midday Sunday, no arrests had been made.