Venezuela’s army is far larger than Guyana’s. But Caracas might achieve better results with deniable “gray zone” attacks against its eastern neighbor than with an outright invasion.

Venezuela, whose leftist leader Nicolas Maduro is a sworn enemy of the Cuban-American Rubio, has laid claim to Guyana's Essequibo, which covers most of the country and is the center of oil production.

U.S. Secretary of State warned Venezuela on Thursday that it would be "a very bad day" for the South American country if it ...

Reduced to a marginal oil producer over the past decade, Venezuela has suffered another blow as United States president ...

Venezuela sounds alarm as US- and UK-backed Guyana ramps up military buildup near controversial Essequibo oil fields.

Tensions between the two nations have escalated due to Venezuela's territorial claims over the 61,600-square-mile oil-rich territory, which is home to 125,000 of Guyana's 800,000 residents.

Oil output in Guyana fell about 3% to 627,000 barrels per day (bpd) in March from the previous month, but the 631,000 bpd ...

ExxonMobil is heavily invested in the offshore Stabroek Block field with the French company Total and Guyana’s Sispro company. Perryman said that even with vast oil and gas reserves Venezuela ...

Top US diplomat Marco Rubio on Thursday bluntly warned Venezuela against attacking its oil-rich neighbor Guyana, brandishing ...

Top US diplomat Marco Rubio on Thursday issued a stern warning against Venezuela if it escalates its claims against newly oil-rich Guyana, brandishing the power of the US military to protect the ...

Asked what the United States would do if Venezuela attacked ExxonMobil oil projects in Guyana, Rubio said: "It would be a very bad day -- a very bad week for them." Stopping short of spelling out ...

Top US diplomat Marco Rubio on Thursday bluntly warned Venezuela against attacking its oil-rich neighbor Guyana, brandishing the power of the US military to protect the small South American nation.