EINDHOVEN, the Netherlands — An anti-discrimination organization that has partnered with FIFA to control fan behavior at the World Cup has issued warnings to gay and transgender fans and people of certain races and ethnicities for next summer’s tournament, highlighting ongoing concerns about threats they may face in Russia.

Speaking ahead of the publication of his group’s guide for the tens of thousands of spectators expected to travel to Russia for the tournament, Piara Powar, the executive director at Fare, warned that some fans will have to be cautious because there are parts of Russia that are not welcoming to the gay community or to darker-skinned people.

“If you have gay fans walking down the street holding hands, will they face danger in doing so?” Powar said. “That depends on which city they are in and the time of day.”

The warnings are similar to concerns raised before the 2014 Winter Olympics in Sochi, which took place a year after Russia passed a so-called “gay propaganda” law. The legislation essentially prohibits the public mention of homosexuality. Europe’s top human rights court declared the law illegal in June, but Russia, vowing to appeal, said it would not honor the ruling.