He apparently made vague, veiled e-mail threats in the past, but nothing that would raise an alarm like this.

Mr. Burke had a storage locker. We executed a search warrant to see if there were any clues to confirm him as the bomber.

We've been very lucky that nobody has been hurt, just minor property damage.

The devices we found were similar to explosive devices that we found elsewhere in other areas.

There is a great deal of probable cause to believe Mr. Burke is a primary suspect.