An innocent bystander was shot after an argument between two groups of men turned violent at tonight's Civic Center Pride celebration.

According to San Francisco Police Department spokesperson officer Albie Esparza, officers were called to UN Plaza just after 6 p.m. Saturday on reports of shots fired.

Esparza says that several groups of men got in a verbal argument near or inside the Pride venue. (Some of this was captured in a Instagram video that has since been removed).

"The incident escalated when one of the subjects pulled out a gun and fired several shots," Esparza says.

One of those shots struck the arm of a 64-year-old male Pride celebrant, Esparza says.

He was transported to San Francisco General Hospital and is in stable condition as of 8:45 this evening.

Responding officers located "several possible suspects" on Market Street and detained them, Esparza says.

According to Esparza, SFPD's Crime Scene Unit, Gang Task Force, and Night Investigations Units are on scene and investigating.

This unfortunate incident echoes similar shootings that happened during or after Pride festivities in 2013, and 2014.