"As developments unfold in Mali, the risks for infiltration and destabilization are real in some of the countries bordering Mali, as illustrated by the efforts of neighboring countries to tighten security along the borders, " said Said Djinnit, who heads the U.N.

CNN: Malian security forces push into rebel territory

We've had sanctions on the government of Sudan, and we're prepared to tighten those sanctions and to do so, both unilaterally as well as to work with the U.N. to try to have sanctions imposed multilaterally.

NPR: U.S. Officials Look for Political Solution to Darfur