#booby-trapped

Residents who live in the same apartment complex as suspected shooter James Holmes were still not allowed to return home as they expected on Tuesday since police said the investigation is not quite wrapped up yet.

More than 30 homemade grenades, 10 gallons of gasoline, improvised explosive devices (IED's) and trip wires or trigger mechanisms have been secured from the apartment.

An unnamed law enforcement official told CNN that grenades were wired to a control box in the kitchen, resembling setups that are more often seen in Iraq and Afghanistan. The official added that had the explosives gone off as intended, they likely would have knocked down the walls of nearby apartments.

Dateline's Chris Hansen reportedly got a peek inside and described what he saw with NBC viewers, remarking that the explosives were sophisticated enough to take the building down.

In the middle of his living room are dozens of black softball shaped firework shells that he bought filled with explosive power. They are all over the place. In the middle there are two jars full of liquid wires as I said all over the place there was a black box with a red blinking light. A mechanical camera then pans over on top of a glass table -- you see this water cooler jug half full of bullet. Then you pan down, then you see this black box with another red blinking light. The camera goes over, there are two chairs one has a jar apparently with fluid. The other has another black box and then there are green soda pop bottles filled with fluid all the way around.