The International Committee of the Red Cross (ICRC) says that intense fighting in northern Sri Lanka has caused a "massive displacement" of civilians. It says thousands of people trapped inside rebel-held territory have had to flee several times in recent months. An ICRC official, Paul Castella, told the BBC that fighting had stopped relief supplies being delivered to rebel-held areas for nearly a week. He said that there were serious concerns about a lack of food. A Sri Lankan military spokesman insisted a supply convoy had been sent to the rebel-held territory and that there were adequate stocks of food.