An environmental and indigenous rights activist in Honduras has been killed four months after the slaying of award-winning environmentalist Berta Caceres stirred international outrage.

The Public Ministry said in a statement Thursday that it had formed a special commission to investigate the killing of 49-year-old Lesbia Janeth Urquia.

Authorities said Urquia's body was found Wednesday in a garbage dump in Marcala, about 100 miles (160 kilometers) west of Tegucigalpa. She had disappeared Tuesday afternoon after going out to ride her bicycle.

The Civic Council of Popular and Indigenous Organizations of Honduras, the indigenous rights group with which Urquia was affiliated, called her death a "political femicide."

It said in a statement Wednesday that Urquia was an indigenous leader and an outspoken activist against hydroelectric projects in the La Paz region, particularly the Aurora I dam.

"Lesbia Yaneth was a fervent defender of the community rights and opponent of the granting of concessions and privatization of rivers in La Paz," the statement said. The group said Urquia's killing "confirms that a plan has been put in motion to disappear those who defend nature's common goods."

Police spokesman Eddie Lopez said Urquia owned three small hotels in Marcala.

The Civic Council group blamed the government for Urquia's death, saying it has failed to protect her and other indigenous activists.

In Caceres' slaying, armed men burst into her home the night of March 3 and shot her four times. She had been complaining of getting threats warning her to stop protests against the Agua Zarca dam on the ancestral lands of her Lenca people. Caceres was internationally recognized after winning the prestigious Goldman Environmental Prize.

In May, authorities announced the arrest of four people in Caceres' killing, including a man working on behalf of the company doing the Agua Zarca dam project and an active duty army officer. The director of Honduras' criminal investigation agency said Caceres was killed for her environmental activism.

Two weeks after Caceres' death, Nelson Garcia, another indigenous environmental activist, was shot to death. He had returned to his home in Rio Chiquito after helping dozens of residents move their belongings when authorities evicted them from lands they had occupied.

According to Global Witness, a London-based environmental organization, Honduras is the world's most dangerous country for environmentalists. Between 2002 and 2014, 111 environmental activists were killed in Honduras, according to the group.