The Venezuelan Prosecutor General's Office has opened another preliminary investigation against self-appointed interim president Juan Guaidó. The opposition leader thwarted the Venezuelan government's years of efforts to return the resource-rich region of Esequibo, said Attorney General Tarek William Saab. He pleaded guilty to treason.

For more than 100 years Venezuela has been claiming the region belonging to neighboring Guiana. In 2015, the conflict rekindled because Guyana had granted US oil company Exxon Mobil mining licenses in the area.

According to the Venezuelan government, the Guaidó camp was urged by the US to abandon Venezuela's claim to esequibo and "hand it over" to multinational corporations such as Exxon Mobil. President Nicolás Maduro called on the judiciary to investigate Guaidó. Esequibo makes up more than half of Guayan territory.

The power struggle between the governments of President Juan Guaidó and President Nicolás Maduro is now taking months. Guaidó was appointed interim head of state in Venezuela in January and is recognized by about 50 states. Since then, a number of cases are already underway, including presumptuousness. He was deprived of his immunity in April but has so far been arrested. The US government warns Madurovor of an arrest of the opposition leader.