According to WTVT-TV, the Hillsborough County Sheriff's Office issued a memo warning deputies about the alleged threat.
The memo, which was branded "situational awareness" and "law enforcement sensitive," went out on Monday, describing Aman's alleged plot to "stab as many children as possible" at the school.
Aman reportedly took issue with the school because of its American pride, and American flag-themed exterior painting.
The memo explained that the 22-year-old — who has a history of several mental disorders — decided to target the elementary school because he despises the United States, and because of the school's "obnoxious pride in America," as "illustrated by the large American flag mural" on the building's exterior.
According to WFLA-TV, the elementary school was named in honor of Francis Bellamy, who wrote the Pledge of Allegiance in 1882. Bellamy lived in Tampa for seven years.
The memo revealed that Aman hid a large kitchen knife in a bag and was on his way to the school to kill the children.
"If adults get in the way, he planned to stab them as well," the memo added.
Aman only reportedly stopped the plan after running into his roommate while on the way to the school. Aman reportedly confessed the plot to his roommate, who, in turn, reported the purported plan to police. Authorities apprehended Aman and took him into custody. No firearms were discovered in a search of Aman's residence.
Crystal Clark, chief communications officer for Hillsborough County Sheriff's Office, told WFLA that an investigation into the incident is ongoing.
"An investigation is ongoing and charges could follow," Clark revealed. "However, there is currently no safety threat for students, parents or staff of Bellamy Elementary."