All went smooth, no signs of breaches in U.S. election infrastructure-DHS chief

There have so far been no signs of breaches in U.S. election infrastructure during voting in Tuesday's congressional elections, U.S. Department of Homeland Security Secretary Kirstjen Nielsen said.

"At this time, we have no indication of compromise to our nation's election infrastructure that would prevent voting, change vote counts or distrust the ability to tally votes," Nielsen told reporters. 

(With inputs from agencies.)