A power outage that disrupted police radio communications contributed to a delayed response to a break-in alarm at a Philadelphia branch bank early Monday morning, officials said.

The FBI is assisting Philadelphia Police in their investigation into the break-in at The Citizens Bank branch on east Main Street after a front glass door was smashed and a small amount of change taken, according to the authorities.

An alarm activation was reported at the bank at 2:32 a.m. Monday morning. Police responded about 13 minutes later.

"The radios were down for a short time because of an issue which occurred when the electricity went off and dispatching was being done over cell phones, which may have caused a slight delay," said Chief of Police Grant Myers.

Several items of evidentiary value were collected at the bank, he said.

"We are following up on some leads," Myers said.

The authorities would not comment on whether or not the burglary was captured on video surveillance.

Greg McKee, President and CEO of The Citizens Bank, said the bank's alarm system was not disabled due to the electrical outage.

He would not say where the change was taken from in the burglary, but the vault wasn't accessed.

McKee expressed appreciation to the Police Department.

"We are very appreciative of their efforts in this regard," he said. "We are thankful that none of employees or customers were injured."

Philadelphia Utilities manager John Burt said a limb fell across a power line at the intersection of Evergreen Avenue and Breazeale Street in the eastern part of the city about 1:45 a.m. Monday.

"Power was out for about 45 minutes," he said.

The Police Department has posted a reward in conjunction with the burglary.

Anyone with information was asked to call PPD at 601-656-2131.