In fact, sources told CNN, there could be an arrest within days. Underground Atlanta , a popular shopping mall and tourist attraction not far from Centennial Park, was evacuated after a suspicious package was found outside a restaurant in the complex. A bomb disposal squad was on the scene and authorities were using a remote-control robot to investigate the package while police kept people at a distance.
Investigators say they have a lot of material to work with.
At least one of the three pipe bombs that were taped together to cause the explosion is intact. In addition, there was a timing device that may help link the bomb to its makers. The device used is said to be more sophisticated than was at first believed. CNN has learned that investigators have a number of videotapes and snapshots and are studying pictures from surveillance cameras that ring the park. They were reportedly acting rowdy and drawing attention to themselves.