Sri Lankan hospital hit by mortar shells . Children young as 4 are treated in local hospitals for their injuries . Aid workers rescue 50 critically injured children and 2 adults . An emerging shortage of humanitarian supplies and diminished access to clean water , sanitation , and food are compounding a crisis , he said . Sri Lankan President has promised to allow safe passage to trapped children .
Sri Lankan hospital hit by mortar shells . Children young as 4 are treated in local hospitals for their injuries . Aid workers rescue 50 critically injured children and 2 adults . Sri Lankan President has promised to allow safe passage to trapped children .