Security measures for a music festival in Birmingham city centre at which four people were shot are to be reviewed.
Three men and a woman were hurt in the shooting at the Urban Music event at Custard Factory complex in Digbeth in the early hours of Sunday.
The men, aged 20, 23, and 25, and a 25-year-old woman were taken to hospital. The woman has since been allowed home.
A risk assessment carried out before the event will now be reviewed, West Midlands Police said.
Supt Matt Ward, of West Midlands Police, said: "What we ensure is that any privately-run event carries out a very robust and rigorous risk assessment with the local police officers.
"That was certainly carried out in respect of these premises.
"We will of course, though, review that risk assessment to make sure that nothing was missed."
The shootings, at the Custard Factory site in Gibb Street, happened at an annual music festival.
A Custard Factory spokesman has said it had not hosted, sponsored, organised or managed the festival, although it had a business relationship with the company responsible for the event.
Earlier the promoters, Urban Music Gathering, said security was inadequate but was the responsibility of another firm.
Factory Events, which programmes nightclub events at the Custard Factory, said it had done "absolutely everything legally necessary".
It added that police said at the start and end of the event that security numbers "were fine".
The three injured men, from Birmingham and Wolverhampton, were said to be in a stable condition earlier.
Police, who were called shortly after 0100 BST, have said the gunman might have been part of a larger group.