Today we're learning that the motorcyclists appear to be associated with the Hell's Angels Motorcycle Club.
"We're not getting any indication they were involved in anything last night before this shooting with anyone so it's a big mystery to us," says Officer James Holmes with the Phoenix Police Department.
Police have few clues as to who opened fire on the motorcyclists and why. They shut down Bell Road between 16th Street and 12th Street overnight and continued their investigation into the morning hours.
At least 6 motorcyclists were riding in the group during the shooting and they are cooperating with police, but they declined an on camera interview.
"Unfortunately, they're not able to tell us a whole lot based on the fact that it was dark and we don't know where those shots came from," said Holmes.
Police say the victims are both in their 20's and the group was likely targeted. Investigators are looking into whether this shooting was gang-related.
"Considering the fact you do have the MC, and they have rivals, they have things that go on with them," said Holmes.
Detectives will also be looking at surveillance video from nearby businesses. So far, they do not know if there was more than one shooter, if they fled by car or foot or why the bikers were targeted.
Police are hoping that anyone with information will call Silent Witness.