Suspect in Philadelphia shooting believed to be mentally ill, law enforcement source says

The man accused of firing at random while wearing body armor and killing five people in a Philadelphia neighborhood Monday is believed to be mentally ill, a senior law enforcement source briefed on the investigation told NBC News.

A motive in the shootings, which spanned multiple scenes over several blocks in the city’s southwest side around 8:30 p.m. Monday, is under investigation, officials said.