The Westboro Baptist Church allegedly intends to picket Nelson Mandela's funeral.
The controversial organisation, which has picketed funerals of US soldiers and other prominent people, tweeted that it will be travelling to South Africa to protest at the struggle icon's funeral.
"THANK GOD for Nelson Mandela being dropped into hell! Westboro Baptist Church booking flight to South Africa (not banned) to picket funeral!" it tweeted.
"'World leaders mourn the death of Nelson Mandela' #Madiba 'Woe unto you, when all men shall speak well of you!' Jesus Christ at Luke 6:26," it later posted.
However, other Twitter users have hit back at the organisation.
"You are truly lost human beings, you claim 2 b people of god but you couldnt be further from the truth you preach nothing but hate," said user @Tuckthestrutt.
"South Africa will most certainly greet you with more extreme prejudice than authorities allow here in the US. Some may not return," said Twitter user @JimFTFD.
"Disrespectful scumbags. If anyone is going to hell, it's you guys," responded another user, @Hushpigg.