CBS 5 News has learned that detectives found grenades and other military munitions at the house where five people died.
"FBI is part of the joint terrorism task force as a result of the munitions that were found," said Gilbert police Sgt. Bill Balafas.
It isn't often that a homicide investigation involves the joint terrorism task force. But then again, it isn't often investigators find six 40mm projectile grenades inside a home, or big barrels our chopper caught officials in hazmat crews taking out Wednesday night.
Weapons experts said they aren't the kind of grenades you need a pin for - they're shot out of a launcher.
Investigators said there wasn't one of those there, but the grenades themselves are cause for major concern.
First of all, no one should have them.
They're property of the U.S. government, and J.T. Ready or anybody else shouldn't even be able to get their hands on them.
Second, and perhaps even more disturbing, they're armor piercing grenades.
It's a high intensity weapon that if used could do unimaginable damage.
"All the munitions were removed last night," Balafas said.
Officials took a good look at the grenades, noting information that will help trace where they came from. Then they were destroyed.
Investigators want to make it clear that any sort of dangerous materials were removed from the house Wednesday night.
They also told CBS News that whatever was in those barrels is harmless.
The FBI is still trying to figure out how those grenades got here in the first place.
Copyright 2012 KPHO (Meredith Corporation). All rights reserved.
Tuesday, June 18 2013 12:58 PM EDT2013-06-18 16:58:02 GMT
Shooting in Home Depot parking lot
One man is dead after an online deal went bad in the parking lot of an Arizona Home Depot, police said. The man approached a vehicle around 3 p.m. occupied by two men who were selling items they had postedMore >
The victim approached a vehicle around 3 p.m. occupied by two men who were selling items they had posted online, according to Phoenix police Sgt. Trent Crump.More >
Tuesday, June 18 2013 1:44 PM EDT2013-06-18 17:44:37 GMT
Arizona State University says it is no longer recognizing the Sigma Alpha Epsilon as a fraternity chapter on its campus. The move comes in the wake of a series of well-publicized incidents where one member,More >
Arizona State University says it is no longer recognizing the Sigma Alpha Epsilon as a fraternity chapter on its campus.More >
Tuesday, June 18 2013 9:23 AM EDT2013-06-18 13:23:30 GMT
A 5-year-old girl set up a lemonade stand across the street from the Westboro Baptist Church compound, and now the group is targeting her. Jayden Sink raised nearly $200 on Friday while she sold lemonadeMore >
A 5-year-old girl set up a lemonade stand across the street from the Westboro Baptist Church compound, and now the group is targeting her.More >
Tuesday, June 18 2013 12:55 PM EDT2013-06-18 16:55:16 GMT
Tempe police need help identifying the woman in the sketch. (Source: Tempe Police)
Authorities in Tempe say the battered, nude body of a woman was discovered in a Tempe neighborhood street early Saturday morning.Tempe Police spokesman Sgt. Mike Pooley said the body was discovered nearMore >
Tempe police said the battered, nude body of a woman was discovered on a neighborhood street early Saturday morning.More >
Monday, June 17 2013 9:21 PM EDT2013-06-18 01:21:07 GMT
An Arizona prison inmate is dead from an apparent homicide, state Department of Corrections officials said. John Jones, 63, died Monday at the Lewis complex in Buckeye. DOC officials stopped short ofMore >
John Jones, 63, died Monday at the Lewis complex in Buckeye.More >