Two couples in the US state of Texas will this week challenge the state’s ban on same-sex marriage.

A lawsuit to challenge a 2005 constitutional amendment in the state will go to court on Wednesday in San Antonio.

The original amendment was approved with around 70% of votes, and the state’s Attorney General Greg Abbott, who is also a hopeful in the race for Governor, has said he will defend the amendment.

Freedom to Marry has hailed this suit as the first in the deep South of the US, to challenge a same-sex marriage ban.

The counsel acting on behalf of the plaintiffs described the ban on same-sex marriage as a “badge of inferiority”, and said the 2005 amendment runs contrary to the US Constitution.