A mass shooting in Philadelphia left at least three people dead and 11 others wounded, police said in the latest case of gun violence in the United States after recent massacres in Texas, New York and Oklahoma where dozens died. Subscribe to the KHOU 11 News YouTube Channel for more stories that Stand for Houston. Follow KHOU 11 on social! FACEBOOK: https://www.facebook.com/khou11 TWITTER: https://www.twitter.com/khou INSTAGRAM: https://www.instagram.com/khou11 Visit our website: https://www.khou11.com