The fire in the single-story, ranch-style house near 72nd and Maple Streets was reported around 8:45 a.m. Thursday.
Police said officers took one of the juveniles into custody after a foot pursuit and located a handgun that the teen had discarded.
An Omaha Fire Department ladder truck helped officers search for property possibly tied to the case on the roofs of the Jiffy Lube and The Hut Discount Store.
Omaha Permaculture, a nonprofit that facilitates economic development in low-income communities, recently received an equipment grant from the Nebraska Recycling Council.
The Douglas County Board voted Tuesday to award $3.25 million in tourism and culture grants to 62 organizations in 2018-19.
In one of the cuttings, officers interviewed the victim, who said he was stabbed by a woman at a party, police said.