article_snippet.sent: The operation has been ongoing," a military source said Monday.
article_snippet.sent: We have a military garrison in Garissa, and the work began immediately after a grenade attack in downtown Nairobi was reported and continued for a number of hours until We were able to rescue 663 students of the 800 students that had been taken hostage by these terrorists.
article_snippet.sent: CNN's David McKenzie and Joseph Netto reported from Nairobi, and Faith Karimi reported and wrote from Atlanta.
article_snippet.sent: CNN's Michael Martinez contributed from Los Angeles.