Investigators are looking for a man and woman who allegedly impersonated police officers and conducted at least two bogus pedestrian stops in South Philadelphia on Sunday morning.

The duo, traveling in a silver Nissan sedan, first pulled up next to a 23-year-old woman who was walking home near Fourth and Jackson streets about 4:30 a.m., police said.

Both suspects exited the car, and the man flashed a badge and identified himself as a police officer. He ordered the victim to walk toward him and threatened to arrest her if she resisted, police said.

The woman instead ran away, and both suspects got back into the car and fled north on Fifth Street.

The two struck again about 6:20 a.m., according to investigators. A 21-year-old man told police he was walking along Passyunk Avenue near Tasker Street when a car stopped abruptly beside him.

The driver exited while displaying a badge and announcing himself as a police officer. He asked the man to show identification, claiming he fit the description of a narcotics suspect, police said.

The victim handed over his wallet, and the man removed his ID and medical card. He passed them to the woman, who was sitting in the front passenger seat, and asked her to "check" them as he frisked the victim, police said.

The woman replied that the cards "matched" and returned the victim's wallet. It wasn't until the pair had sped off that he realized his money – $14 in cash – was missing, police said.

No injuries were reported during either incident.

The male suspect was described as a bald white man in his 40s, about 180 pounds, possibly sporting a mustache. The female suspect is a 5-foot-5, dark-haired white woman, about 200 pounds, between the ages of 25 and 35, and last seen wearing glasses, police said. The pair was believed to be traveling in a four-door older-model silver Nissan with a light-colored interior.

Anyone with information was asked to contact Philadelphia police.