Honduras beauty queen Maria Jose Alvarado, 19, and her sisterSofia Trinidad, 23, have been found dead, officials say.
The two women went missing on Thursday, after they were spotted leaving a party in the Santa Barbara region.
Ms Alvarado had been due to compete in the upcoming Miss World contest in London.
Four people, including Ms Alvarado's boyfriend, have been questioned over the disappearance.
The two women's bodies were found in Cablotales village, near the River Aguagua, National Bureau of Criminal Investigation chief Leandro Osorio said.
"We are 100% sure that it's them," he added.
Mr Osorio said a suspect had been detained, and weapons and a car had been seized.
A "protected witness" had provided valuable information, the police chief added.
The two women were last seen alive in a car without a licence plate as they left a birthday party on 13 November.
According to a UN report, Honduras has the world's highest homicide rate, with 90.4 people murdered per 100,000 of the population.