CYPRESS PARK (CBSLA) — “At least” six people were shot Saturday evening in an attack during a party in Cypress Park.

Detectives are on scene trying to determine what led to the incident.

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Initial reports from the scene said five were shot.  The shooting took place just before 7:15  p.m. at San Fernando Road and Merced Street.

CBS2/KCAL9 reporter Laurie Perez was on scene where officials told her there were at least five people shot and transported. They later amended that number to six and said there could even be more victims. A possible seventh victim reportedly self-transported to a hospital.

Several people fled the scene before authorities could arrive.

Officials told Perez two people were in serious condition, at least one was critical and two had non-life threatening injuries.One person had minor injuries.

One witness heard at least 12 shots.

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Authorities said there was a party at Angel City Collision Center when two to four people walked in and began firing.

Police said several different caliber guns were used.

Initial reports said the shooting occurred on a Metro bus but those reports were quickly discounted. Apparently, one person who got on the bus and tried to blend in with other passengers had also been wounded. That person was detained.

A large group of people were being detained at the scene. Police stopped short of calling any of them suspects. They said as many as nine of the people they detained could be among people who fired back at the original shooting suspects.

Two suspects have been detained and two more may be at large.

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Police sources told Perez they believe the incident was likely gang-related.