UPDATE | Gunman wounds 6 police officers in Philadelphia

PHILADELPHIA (AP) — At least one gunman opened fire on police today as they were serving a warrant in a city neighborhood, wounding six officers and triggering a standoff that extended into the evening, authorities said.

None of the officers' injuries were considered life-threatening, Philadelphia police Sgt. Eric Gripp said. They were being treated at hospitals.

The shooting began about 4:30 p.m. as officers went to a home in Nicetown, a north Philadelphia neighborhood of brick and stone rowhomes. Shots were still being fired three hours later, police said.

Officers were negotiating with the gunman and imploring him to surrender, while urging people to stay away from the area, Gripp tweeted.

Two officers became trapped inside the house amid the gunfire, The Philadelphia Inquirer reported.

Live video from news stations showed a massive police presence, with dozens of squad cars and officers, many of them with guns drawn.

Temple University locked down part of its campus, and several children and staff were trapped in a nearby day care.

Police tried to push crowds of onlookers and residents back from the scene. In police radio broadcasts, officers could be heard calling for backup as reports of officers getting shot poured in.

Dozens of officers on foot lined the streets. Others were in cars and some on horses.

One officer appeared injured and was taken away in a police car. Video also showed two other officers carrying a man and putting him in the back of a police car.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said its agents responded to the scene to assist Philadelphia police.

President Donald Trump and Attorney General William Barr were briefed on the shooting, officials said.

6:34 p.m.

PHILADELPHIA (AP) — At least one gunman opened fire on Philadelphia police this afternoon, wounding at least six officers in a standoff that extended into the evening.

A shooter remained active as of 6 p.m., Philadelphia Police Sgt. Eric Gripp tweeted. At least one suspect fired at police officers in the city's Nicetown neighborhood, Gripp said.

All officers' injuries are considered nonlife-threatening, including one shot in the head, he said.

Live video from news stations showed a massive police presence in a neighborhood with dozens of police cars and officers, many of them with their guns drawn.

Gunshots continued to be heard late this afternoon.

One officer appeared injured and was taken away in a police car. Video also showed two other officers carrying a man and putting him in the back of a police car.

Officers were taken to Temple University Hospital, Gripp said. But the hospital wouldn't provide the officers' conditions.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said numerous agents responded to the scene to assist Philadelphia police.

Police asked news helicopters to stay away from the area as they hinder operations.

5:32 p.m.

PHILADELPHIA (AP) — Police say several officers have been injured in "active and ongoing" shooting situation in the city.

This is a breaking news story. Check Vindy.com for updates.