The two men were booked into jail in Clark County, Nevada.
The Las Vegas Metropolitan Police Department said the suspects were arrested together around 10:50 a.m. on Flamingo Road in an area near the Rio Hotel. When confronted by deputies, officials told KIRO they complied and were arrested without incident.
The two men were suspects in the shooting that left one woman dead and injured seven others, including a 9-year-old boy, on Jan. 22.
The third suspect, who was already in custody, Jamel Linonell Jackson, 21, was one of the shooters, according to the police chief. He was also one of the eight people who was shot Wednesday.
Police said Jackson was arrested on a firearms violation in connection with the shooting for possessing a gun at the scene. He was booked into jail at 10:19 p.m. Wednesday after he was released from Harborview Medical Center. His bail was set at $50,000.
This is a developing story. Check back with KIRO7.com for updates.