ALEPPO, Syria — The consequences of the war here have become familiar: neighborhoods shelled, civilians killed and refugees departed. But in the background, many Syrians describe something else that has them cowering with fear: a wave of lawlessness not unlike the crime wave Iraq experienced during the conflict there.


From Dara’a, near the Jordanian border, to Homs, Damascus and here in Syria’s commercial capital — the fighting has essentially collapsed much of the civilian state. Even in neighborhoods where skirmishes are rare, residents say thieves prey on the weak, and police stations no longer function because the officers have fled.


Kidnapping, rare before, is now rampant, as a man named Hur discovered here last month. He simply wanted to drive home. The man shoving a pistol into his back had other plans. “Keep walking,” the gunman told Hur, 40, a successful businessman, as they approached his car. “Get in.”


Hur said he initially thought he was being arrested by government agents. But then, after blindfolding him, his three captors made a phone call that revealed baser motives.


“They asked my family to ransom me with 15 million Syrian pounds,” Hur said of the abductors’ demand for about $200,000. “They were criminals, not a political group. They told me they knew me and they knew my family could pay.”


Rebel leaders have been trying to fill the void. “We are running patrols to protect our areas from thieves and criminals,” said Abu Mohammad, 30, a rebel fighter in eastern Aleppo.


But as bloody ground battles rage throughout the city, rebel control is limited. Syrians in Aleppo and elsewhere now say they bury their jewelry and other valuables inside their furniture. Some people no longer keep money in their pockets when they venture outside; residents and business owners across the country are padlocking their property to protect against armed opportunists mingling with combatants.


“No one wants to leave their houses, because you never know who is going to stop you or attack you,” said Yasmin, 50, a resident of Aleppo who was too afraid to give her last name. “Chaos, lawlessness, fear, it is just so chaotic, and with all the thugs in the streets, you never know who might kidnap you and ask for a ransom.”


Aleppo’s slide toward something resembling anarchy began months ago. Factory owners here in the country’s industrial capital said the roads outside the city went first, as armed bandits seized whatever they wanted from passing vehicles. One of Syria’s main automobile exporters recently told a Lebanese friend that he had to start sending vehicles to Iraq by boat from Lebanon because of the insecurity.


Then more reports of kidnappings started surfacing. By the end of March, as the government claimed to have retaken control of nearby cities, ransom demands were a daily occurrence in Aleppo, said Amal Hanano, a Syrian writer and analyst living in the United States. Usually, she said, the kidnappers asked for around $75,000 and then dropped their price to a fifth of that after tough negotiations.


Hur, using a nickname out of fear that he could be targeted again, said that his brother talked his kidnappers down to about $30,000 in Syrian pounds. It took a week. He said he spent most of the time tied to a water pipe in the back of a small store somewhere outside Aleppo.


His kidnappers made sure he had enough food and water. They took his cellphone, his watch and a gold ring but they left his car near the city, to establish their credibility. “They told my family where to find the car and the keys to prove that I was with them,” said Hur, indicating that they had probably kidnapped before.


In addition to gaining more expertise as the conflict drags on, criminals are also becoming more brazen. Yasmin said that a few days ago her cousin, a 65-year-old man, was robbed in his garden at 1:30 in the afternoon. His family watched helplessly as the thieves stole all he had, about $70. Now her brother, who lives across the street, makes sure his pockets are empty before he leaves home.


“We’ve all become a lot more careful since that incident,” Yasmin said. “Can you imagine? It’s not even safe to carry $70.”