Rochester Mayor Malik Evans is asking city police to step up enforcement of illegal gatherings -- such as the one early yesterday morning where four people were shot.
And he wants anyone who hears about plans for such a gathering to call 9-1-1.
Twenty-four-year-old Willie Wofford was killed, and three other people were wounded during a fight outside the Baden Street Recreation Center.
Evans says more than 300 people had gathered there for a party.
The hostility of the crowd prevented an ambulance crew from safely getting to Wofford. Police in a patrol car drove him to the hospital, where he died a short time later.
The other shooting victims are recovering.
No one has been arrested.
Police say Wofford had a criminal record, and had been shot several years ago.