President Barack Obama is condemning the attack on a United Nations office in northern Afghanistan Friday.
In a statement, Obama offered his condolences to those injured and killed, as well as their families. At least eight foreigners and four Afghan protesters were killed when a demonstration outside the office turned violent.
The demonstrators were protesting a reported burning of the Muslim holy book.
Obama thanked the United Nations officials, including Afghan staff, for the work they undertake in support of the Afghan people. He said their work is essential to building a stronger Afghanistan.