A federal law enforcement source told CBS News that local police arrested eight people. The official said some of those apprehended were wearing body armor.

Alvarado police offers were dispatched to the detention center in the 1200 block of Sunflower Lane around 10:56 p.m. Friday, according to the Johnson County sheriff’s office. The call was made to investigate a report of “a suspicious person.”

Two teenage boys were killed in a mass shooting incident that took place early Saturday morning in Indianapolis, according to police. Officers responded to calls of a disturbance around 1:27 a.m. near Washington and Meridian Street when they heard shots fired, according to the Indianapolis Metropolitan Police Department.

The Detroit Police Department is investigating after three teens were injured in a triple shooting early Saturday morning. Captain Shannon Hampton says shortly before 3 a.m. on July 5, police received a Shotspotter alert in the area of Acacia Avenue and Bentler Street. Police say the victims were identified as two 18-year-olds and a 17-year-old.

Two 18-year-olds and a 17-year-old are in critical condition following a shooting at an illegal street gathering in Detroit, police said.