The United Nations has decided to block 11 gay- and transgender organizations to attend at an high-level UN AIDS-meeting conference next month.

This decision comes after that 51 Muslim countries demanded that these 11 NGO groups should be stopped particapating, because they have been involved in lesbian, gay, bisexual and transgender advocacy, according to Samantha Power, US ambassador to the United Nations, Reuters reports.

"The movement to block the participation of NGOs on spurious or hidden grounds is becoming epidemic and severely damages the credibility of the U.N.," said Samantha Power, US ambassador to the UN.


The decision to block these organizations,  has sparked a protest by the United States, Canada and the European Union.

The issues of LGBT rights and participation in events at the United Nations have long been contentious. UN Secretary-General Ban Ki-moon has advocated for LGBT equality but faced opposition from African, Arab and Muslim states as well as Russia and China, according to Reuters.