Voters around the U.S. registered just a few complaints of alleged intimidation at polling places by late Tuesday, leaving experts and voting rights advocates thankful that threats by extremist groups to converge on polling places did not materialize.

But they were still on guard for the hours, days and weeks to come.

Kristen Clarke, president and executive director of the Lawyers’ Committee for Civil Rights Under Law, which runs a national voting complaint hotline, told reporters late Tuesday afternoon there were “very isolated and sporadic” reports of alleged intimidation, including armed individuals at polling places.

“Fortunately this hasn’t been a systematic or widespread issue,” she said. “We certainly were prepared for this being a bigger problem than it proved to be today.”

Read more: USA Today