Tens of thousands of children trapped in intense fighting in Misrata are in serious danger amid concern over a humanitarian crisis in the only city in western Libya not under the control of Muammar Gaddafi.

At least 20 children, mostly under the age of 10, have been killed in the besieged city in the past month, according to Unicef, the UN children’s agency. Many more have been injured by gunfire or shrapnel from mortars and tank shells.

Thousands of children are caught in the middle of the battle to control the city that has been raging for more than six weeks. Most lack access to sanitation and safe drinking water, Unicef said…