The Brief

Philadelphia police are hosting a Thursday morning press conference to announce an arrest in a mass shooting that killed three people last month in Grays Ferry.

A total of nine other people suffered injuries in the shooting.

Since the incident, police have released several video of the incident in an attempt to identify a number of suspects.

Philadelphia police are expected to update their investigation into a mass shooting that claimed the lives of three people and left nine others injured back on July 7 in Grays Ferry.

Sources tell FOX 29 police are expected to announce an arrest in the case.

What we know:

Police will be holding a 10:30 a.m. press conference Thursday to provide an update on the deadly July 7 mass shooting that occurred on the 1500 block of South Etting S

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