The teenager who died on Saturday was among a group of girls who recently underwent Female Genital Mutilation.
"Her parents forced her to marry an old man. She refused and village warriors descended on her with beatings. She lost her life as she was being 'disciplined'", a source told the Star on Sunday.
The suitor was to give livestock to the girl's family for dowry.
Contacted, Tiaty East Deputy Commissioner Steve Muonge said he had not received a report on the death.
"If that is true, the culprits should be arrested immediately to face murder charges. I will instruct officers on the ground to take up the matter," he said.
Muonge said areas bordering Nasorot, Akwichatis, Silale and Mondi are notorious for the outlawed female "cut" and early marriages during August holidays.
Cleansing
Sources said villagers were preparing for a traditional cleansing ceremony known as "Labai" to punish the wrongdoers.
The clan of the culprits will be required to give a large number of cows and goats as a fine. The animals will be shared evenly among members of the girl's clan.
"If the agreed number of animals is 600 cattle, there is an agreement to ensure generations of the accused clan complete paying the animals so they can be forgiven and cleansed," the source said.
Courtesy Joseph Kangongo