A new threat intelligence report from Microsoft says foreign adversaries have showed continued determination to influence the U.S. election and there are signs their activity will intensify as Election Day nears.

Iranian hackers are gearing up for a potentially major influence operation ahead of the U.S. elections, running parallel to increased election interference efforts from China and Russia, Microsoft said in a report released Wednesday.

Russia, China and Iran are intent on fanning divisive narratives to divide Americans ahead of the Nov. 5 U.S. elections and may consider fomenting violence after voters go to the polls, U.S. intelligence officials said on Tuesday.