Civil rights groups intensified their legal fight against the US state of Georgia's new voting restrictions with a third federal lawsuit.
Meanwhile, Delta Air Lines and Coca-Cola, based in Atlanta, continued to face boycott calls from activists who said they must to do more to oppose the law.
The Republican-backed law, which Governor Brian Kemp signed last week, toughened ID requirements for absentee ballots and gave politicians the power to take over local elections.
It limited the use of ballot drop boxes, shortened early voting periods for run-offs and made it a misdemeanour for members of the public to offer food and water to people waiting in line to vote.
The lawsuit filed in US District Court in Atlanta late on Monday called the law racially discriminatory and "an attack on democracy".
"This law is voter suppression, plain and simple, and aimed at making it harder for black and brown and other historically disenfranchised communities to have a voice in our democracy," said Sophia Lakin, of the American Civil Liberties Union.
"It is an absolutely shameful response to the historic participation by these communities in the last election cycle."
