The 27-year-old man was arrested while buying weapons allegedly to carry out the attack, intended to target large groups of people. The threat levels in the country continue to be high.

An Afghan national was arrested in the US state of Oklahoma for allegedly planning an attack on election day, the US Department of Justice said on Tuesday.

According to the indictment, the 27-year-old plotted to provide "material support” to the so-called Islamic State group (IS) and obtained firearms and ammunition to “conduct a violent attack on US soil in the name” of the group.

The FBI said it found communication between the suspect, Nasir A. T. and a person whom he believed to be affiliated with the Islamic State.