SEATTLE — Three teens are suspected in a drug-related shooting that left two people dead and three wounded at a well-known Seattle homeless camp, as the city struggles with a surge of people living on the streets.

The suspects — boys ages 13, 16, and 17 — were arrested Monday in what police described as a ‘‘targeted’’ shooting at the encampment known as the Jungle, about a mile from downtown.

Police believe that the Jan. 26 killings stemmed from a low-level drug-dealing dispute and that the suspects and victims knew each other or knew of each other.

The number of people living on the street or in their cars in Seattle and the county of nearly 2.1 million people has jumped to more than 4,500, a 19 percent increase from last year, according to a one-night annual survey conducted Friday.

‘‘We are involved in a homeless crisis, the like that we have not seen since the Great Depression,’’ Mayor Ed Murray said last week.

Associated Press