A total of 12 people have been shot in Philadelphia's Grays Ferry neighborhood, leaving three people dead, police said.

Three people were killed and nine others wounded in a mass shooting early Monday morning in South Philadelphia, police said. The deceased victims were identified only as a 24-year-old man, a 23-year-old man and a 19-year-old man, local CBS affiliate KYW reported.

At least 13 people, including juveniles, were shot in Philadelphia's Grays Ferry neighborhood early Monday morning. Three of the people injured have died. Reporter Ross DiMattei has the latest on the investigation.