Michell Simon, a Mexican television broadcaster and model, was discovered dead on Tuesday south of the capital, Mexico City, authorities said.

Workers extinguishing a fire on the Picacho-Ajusco highway discovered her body wrapped in blankets, according to the Attorney General's Office of Mexico City.

On Twitter, police spokesman Ulices Lara Lopex claimed that they had undertaken inspections and interviews with witnesses at the scene.

Authorities did not give a cause of death but said they were looking into several possibilities.

Last Friday, relatives, and friends of the journalist, who was born in the southern state of Veracruz, reported her missing. Her death would make her the sixth journalist to be found dead in mysterious circumstances in Mexico this year.

Many of the deaths are alleged to have been carried out by criminal gangs and drug gangs, as well as corrupt authorities enraged by reporters' work, according to media protection groups and activists.

Journalists protested in Tijuana, Mexico's northern border city, last week, urging President Andres Manuel Lopez Obrador to put an end to violence against journalists.

See this: Danger looms over Mexico’s journalists

Earlier, the fifth journalist to be killed this year in Mexico was found shot dead, according to an official. 

The journalist, Heber Lopez Vazquez, was shot in his car, according to state prosecutor Arturo Calvo on Milenio TV channel. He runs the news website Noticias Web in Oaxaca, south of the country.

Upon attempting to flee the crime scene, two suspects were arrested and their guns were recovered, according to Calvo, who revealed that the party that ordered the murder remains unknown.