The Essex County Prosecutor's Office is expected to make an announcement on Thursday regarding the investigation into a deadly mass shooting last month.

The shooting happened on Nov. 15 near Chancellor Avenue. Five people were shot – three of them fatally. A 10-year-old boy was among those killed.

Authorities offered a $20,000 reward for information leading to an arrest.

The announcement is expected to occur at 10:30 a.m.

The Essex County Prosecutor's Office is expected to make an announcement on Thursday regarding the investigation into a deadly mass shooting last month.

The shooting happened on Nov. 15 near Chancellor Avenue. Five people were shot – three of them fatally. A 10-year-old boy was among those killed.

Authorities offered a $20,000 reward for information leading to an arrest.

The announcement is expected to occur at 10:30 a.m.