With Syrian government troops closing in on Aleppo, some residents are preparing to flee while others are storing up food and other supplies for a long siege. Here's what we know about what's happening to the war-ravaged country's largest city.
— Before the war began in 2011, Aleppo was Syria's commercial hub of 2.1 million people. Now, it's a bastion of the opposition in the north, although there are no accurate statistics about how many still live there.
— The government controls the western portion of the city, while the east is held by insurgents. A government offensive has cut a vital supply route north to Turkey for the rebels, leaving just one corridor to the outside world.
— The U.N. warns that hundreds of thousands of people could be cut off from humanitarian aid as siege conditions tighten.
— The price of diesel fuel has doubled in the past two weeks as supplies dwindle, and there are bread shortages. People are starting to hoard what food they can, with one person saying he has stored about 200 pounds of supplies.