Unicef says 4 children killed in Yemen crackdown

The United Nations says four children were killed by live ammunition in two days of unrest in Yemen.
A spokeswoman for the U.N. childrens' fund says 18 minors also were injured Sunday and Monday.
Marixie Mercado told reporters in Geneva on Tuesday that the casualties were confirmed by Unicef's local partners in Yemen.
Mercado says Yemen is "on the verge of a humanitarian disaster" due to lack of food, safe water and the growing risk of disease in the country.
Yemeni medical officials say pro-regime forces have killed at least 60 people since Sunday as anti-government protesters step up their campaign to topple President Ali Abdullah Saleh.