Karachi, Pakistan ? Anti-American violence returned Friday to the southern port city of Karachi when gunmen ran out of a park and opened fire on Pakistani police guarding the U.S. Consulate, killing two officers and injuring at least five other people.

It was the first attack targeting U.S. interests in Pakistan since June, when a suicide bomber rammed an explosives-filled car into the wall of the same consulate, killing 12 Pakistanis.

An unknown number of gunmen emerged from the park across the street from the heavily fortified consulate Friday and opened fire on the policemen, some of whom were eating lunch and had put down their weapons. One attacker grabbed an officer’s automatic rifle and turned it on police.

After a chase through the park, officers tackled one of the assailants and arrested him. The man, who was found carrying a pistol, was identified as an Afghan national, police said.

The wounded were taken to a hospital by motorists who stopped to help, witnesses said. Alam Zeb, an off-duty officer who suffered a bullet wound to the neck, was in a washroom next to the guard post preparing for midday Muslim prayers when the attack began. Another of the wounded was a passer-by caught in the crossfire.

No Americans were injured in the attack.

Karachi, a port city of 14 million people, has become one of Pakistan’s leading centers of anti-Western violence.