Reigning Miss Honduras, Maria Jose Alvarado, vanished with her sister, Sofia Trinidad, after a party last Thursday.
BBC reports, citing officials, that Alvarado, 19, and her sister have been found dead.
The pair had been celebrating a friend’s birthday near their home town of Santa Barbara, where student Alvarado was spending time with her parents before flying this week to London to represent her country.
The missing women were last seen getting into a vehicle as they left the party.
It emerged on Monday four people including Trinidad’s boyfriend had been arrested and were being questioned as the last-known people to see them alive.
Coello confirmed: “Four people are under arrest. They include the owner of the party venue and Sofia Trinidad’s boyfriend. They are being investigated.”
The case has caused consternation in the notoriously violent central American country, home to the most dangerous city on the planet.
San Pedro Sula, just over 30 miles from Santa Barbara, is the murder capital of the world with more than 1,200 killings a year among its nearly one million inhabitants.
Its murder rate of 169 per 100,000 people far surpasses anything in North America or much larger cities like Lagos or Sao Paulo.