The militants who slaughtered 147 people in a Kenyan school appeared to have planned extensively, even targeting a site where Christians had gone to pray.

Survivor Helen Titus told The Associated Press on Friday that "They investigated our area. They knew everything." Titus, a 21-year-old English literature student, was shot in the wrist and is being treated at a hospital in Garissa, where the attack by al-Shabab Islamic extremists happened.

One of the first things that the assailants did early Thursday, she said, was to head for a lecture hall where Christians were in early morning prayer. Also Friday, a few men walked down a road in Garissa with signs including one that read "We are against the killing of innocent Kenyans!!!! We are tired!!"