Glendale police responded to a report about a suspicious flashlight in a yard Friday night.
The flashlight resembled the three flashlight bombs that exploded recently. Two were in Glendale and the other in Phoenix.
As it turns out, this was not another exploding flashlight.
Earlier on Friday, Phoenix police were called out to a Goodwill store that discovered a suspicious flashlight. That too turned out to be nothing, but as you can imagine, people are on alert.
So far, no one has been killed by these flashlight bombs, but five people have been injured.
On Friday, FOX 10's John Hook talked to the Special Agent in charge of the investigation, Tom Atteberry of Alcohol, Tobacco, Firearms and Explosives about the case. Atteberry is concerned the bomber could escalate their attacks.
"A lot of these bombers that do this, they could be testing their devices to see how they function..and they progress and they get better. That's what happened in one case..the unabomb case..he got better and better over the years to the point where in the end, his devices were very lethal. Very intelligent..intellect, yes, but we take all bombings seriously, whether they're a crude device or very sophisticated device. They're meant to injure, maim or kill," he said.
It's often tips from the public that brings these bombers to justice. In the unabomber case, Theodore John "Ted" Kaczynski's his own brother turned him in.
The ATF has set up a special hotline in this case and there is a $10,000 reward.
TIPLINE: 1-888-ATF-BOMB (283-2662)