COLORADO SPRINGS, Colo. -- A trio of siblings wanted in connection with a crime spree that began in Florida and continued into Georgia are believed in Colorado, law enforcement said Tuesday.

The Colorado Springs Police Department said it received a report Tuesday afternoon that what police are calling the Dougherty Gang -- a stripper and her two heavily armed brothers -- may have been spotted in the area of Woodmen Road and Interstate 25.

Officials with the Denver FBI said that the Colorado Springs sighting is credible, based on multiple interviews with witnesses.

"This appears to be the real deal," said FBI spokesman Dave Joly. "While their direction of travel is unknown, investigation indicates they may attempt to avoid detection by camping or staying in rural areas."

Investigators believe the trio may have purchased a tent at an REI sporting goods store at 1376 E Woodmen Rd. in Colorado Springs around 1:30 p.m. The FBI did not say if surveillance video from REI helped identify the trio as being in the store.

The original sighting was called in by a customer in the parking lot of the store.

Ryan Dougherty, 21, sister Lee Grace E. Dougherty, 29, and half-brother Dylan Dougherty Stanley, 26, have been on the run for a week since, police said, they shot at a Florida police officer attempting to pull over their white Subaru Impreza for speeding. A few hours later, they robbed a bank in Georgia, police said.

Police warned Tuesday that the siblings are packing a powerful arsenal and are not afraid to use it.

"We are encouraging all residents to be on the lookout and implore residents to exercise extreme caution and to not approach the suspects, if seen," said Colorado Springs police Sgt. Steve Noblitt. "The Dougherty suspects should be considered armed and very dangerous."

The three people who match the description of the Dougherty siblings were last seen in a white Subaru Impreza with Texas license plates LCS 909. Police said the plates have been reported stolen in Texas.

Anyone with information on the whereabouts of the Dougherty suspects is asked to call 911.

"Given the nature of their alleged crimes in Florida and Georgia, the suspects should be considered armed and extremely dangerous," Joly said.