The girl, identified only as Rawan, died in the tribal area of Hardh in northwestern Yemen, which borders Saudi Arabia. Activists are now calling for the groom, who is believed to be around 40 years old, and her family to be arrested so they can face justice in the courts.
They say arrests would help put a stop to the practice of marrying very young girls to older men in the impoverished region.
Angry Man, a blogger, posted that the man was 'an animal who deserved to be punished severely for his crime'.
'All those who supported such a crime should also be punished,' he added.
Another blogger, called Omar, wrote: 'Rawan’s family members are not humans. They do not deserve to have children.'
But another blogger, called 'Sad', appeared more sympathetic to the custom. He wrote: 'Her family and her groom could have waited for some time before having this marriage,' Sad said. 'It was not fair at all and the marriage should not have happened even if some tribes believe that it is a good custom.'