Here's the La Nacion story, here's a translation of the top:
A bomb was found in the Gran Rex Theatre, according to judicial sources in contact with La Nacion. It is a device that was found in the lighting system of the theatre. The explosive was to be activated by cell phone.
The artifact, which was successfully defused, was found by a member of the security and control personnel of the theatre during a routine check. Tomorrow in the theatre hosts the visit of the ex-President of Colombia, Álvaro Uribe, along with other personalities.
"It was designed to explode tomorrow (Wednesday) at 4pm, when the ex-President of Colombia would be in the theatre", said judge Norberto Oyarbide who inspected the location.