Indianapolis ? Four men have been arrested in connection with the fatal shootings of a baby, a toddler and their mothers while the women held their children in their arms, police said Saturday.

All four suspects are from Indianapolis, police Lt. Jeff Duhamell said.

“We think we got the primary people that were involved in the homicide,” he said, adding that investigators are not releasing a motive behind the killings.

Friends Andrea Yarrell and Gina Hunt, both 24, and their children, ages 4 months and 23 months, were all shot repeatedly late Monday in their home in an attack that sparked outrage in the city.