CAIRO — The neighbors watched helplessly from behind locked gates as an exchange of gunfire rang out at the police station. Then about 80 prisoners burst through the station’s doors — some clad only in underwear, many brandishing guns, machetes, even a fire extinguisher — as the police fled.

“The police are afraid,” said Mohamed Ismail, 30, a witness. “I am afraid to leave my neighborhood.”

Three months after the ouster of Hosni Mubarak, a crime wave in Egypt has emerged as a threat to its promised transition to democracy. Businessmen, politicians and human rights activists say they fear that the mounting disorder — from sectarian strife to soccer riots — is hampering a desperately needed economic recovery or, worse, inviting a new authoritarian crackdown.

At least five attempted jailbreaks have been reported in Cairo in the past two weeks, at least three of them successful. Other attempts take place “every day,” a senior Interior Ministry official said, speaking on the condition of anonymity because he was not authorized to talk publicly.