Police sergeant says authorities are ‘imploring shooter to surrender and avoid further injuries’

Multiple police officers have been wounded after a gunman opened fire in Philadelphia on Wednesday, during a standoff that extended into the evening.

The police sergeant Eric Gripp tweeted that at least six officers were shot in the incident in the city’s northern Nicetown neighborhood. All the officers’ injuries were considered non-life-threatening, he said, and were being treated at local hospitals.