"There is no alleged bomb attack. The only thing in the public documents [is] that there are two weapons charges for individuals that were arrested there last week," Marc Raimondi said.
Raimondi noted that the reports came from anonymous sources that the department had never commented on or confirmed.
"The only thing I'm aware of, and that the court has released, is the public indictment," the spokesperson said.
The indictment, filed on November 19, says that Olajuwon Ali Davis and Brandon Orlando Baldwin made a "false and fictitious written statement" when buying a pair of pistols in order to deceive a gun dealer in Hazelwood, Missouri.
The St. Louis Post-Dispatch reported last week that the men had planned to detonate a pipe bomb on the viewing platform of the Gateway Arch and to kill Ferguson Police Chief Tom Jackson and St. Louis County Prosecuting Attorney Robert McCulloch.
They were arrested three days before a grand jury decided against charging white police officer Darren Wilson for shooting and killing Michael Brown, an unarmed 18-year-old, during an altercation in Ferguson on August 9.
