Reuters reports: Sheltering in tunnels, improvised bunkers and rooms fortified by sand-filled fridges, Islamic State is holding out in the Libyan city of Sirte, defending itself with snipers, booby-traps and car bombs against pro-government forces.

After a six-month campaign of often fierce street fighting, Islamic State militants are surrounded in a district less than one-kilometer square, after hundreds of U.S. air strikes that began in August in support of Libyan forces.

The battle for Sirte, taken by Islamic State more than a year ago, may be over soon. But how the militants managed to survive may give insight into the kind of tactics they could use to defend other cities. [Continue reading…]