PHILADELPHIA — A heavily armed gunman in a bulletproof vest opened fire on the streets of Philadelphia on Monday night, seemingly at a random, killing five people and wounding two boys before surrendering, police said.

       The shootings took place over several city blocks in the southwestern neighborhood of Kingsessing. Responding officers chased the suspect as he continued to fire, and he was arrested in an alley after giving himself up, Police Commissioner Danielle Outlaw said at a news conference.

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       “Thank God our officers were on the scene and responded as quickly as they did. I can’t even describe the level of bravery and courage that was shown, in addition to the restraint that was shown here,” Outlaw said.