Two people are dead and one is in custody after a shooting Thursday morning on Detroit's east side. 

Police say the shooting happened just before 11 a.m. Thursday in the 3800 block of Bewick Street. When officers arrived, they found two people dead in the street. 

Investigators say a gunman shot another person, and then that gunman was shot by someone else. Detroit Police Chief Todd Bettison says the second shooter may be a relative of the first victim and could have been acting in self-defense. 

"It's been too much violence in this city. Even though crime is down, it doesn't feel like it," Bettison said. 

Bettison says some of the violence plaguing the city this summer is gang-related. 

"To those groups in gangs, you have my full attention. You have law enforcement's full attention, and you got the feds' full attention, so expect indictments to come as well," Bettison said. 

An investigation is ongoing.