“I saw where a gunshot victim said there were three shooters. We have not been told that by authorities. What is the truth?”
I do not know for certain because of the limited information available.
However, based on the number of rounds fired and the number of killed and wounded it appears that there was more than one shooter. Many victims were shot multiple times. Some as many as twelve times.
Although I understand that initial reports from chaotic situations are suspect, one person there said that there was a guy in a car across the street shooting at people running out of the club.