Churches are fighting against gay marriage in Cuba.

Worshippers wave paper flags that read in Spanish "I am in favour of the original design. The family as God created it. Wedding between man and woman", during a service at a Methodist Church in Havana, Cuba, October 4, 2018. (REUTERS/Alexandre Meneghini)

HAVANA (Reuters) – Cuban evangelical churches are collecting signatures to petition against a proposed constitutional amendment that would open the door to gay marriage, as part of an unusually strong non-governmental political campaign for the Communist-run island.