Four people have been arrested in connection with the suspicious death of an 11-year-old boy in Wylie, authorities said.

According to the Wylie Police Department, just before 5:30 p.m. Monday, officers and Wylie Fire-Rescue were called to a home in the 1600 block of Long Meadow Road on a report of an unresponsive child.

When emergency crews arrived, they said the 11-year-old boy was unconscious and immediately started life-saving measures. Police said the boy was transported to a hospital, where he was pronounced dead.

Investigators with the Children's Advocacy Center of Collin County responded to the boy's home to assist in the investigation.

On Tuesday, a search warrant was executed at the home, and Wylie PD said detectives obtained arrest warrants for 28-year-old Sadie Hope, 30-year-old Sade Hope-Johnson, 46-year-old Eunice Johnson-Lightsey, and 67-year-old Clifford Johnson.

Clifford Johnson is the victim's grandfather, Eunice Johnson-Lightsey is the victim's aunt and Sadie Hope and Sade Hope-Johnson are cousins, Wylie PD said. All four have been charged with injury to a child and abandoning and endangering a child, police said.

The investigation is ongoing, and additional charges may be added, police said.