Venezuelan President Nicolas Maduro has declared a 60-day state of emergency due to what he called plots from within the OPEC countries and the United States to topple his leftist government.
Mr Maduro did not provide details of the measure on Friday.
A previous state of emergency, implemented in states near the Colombian border last year, suspended constitutional guarantees in those areas, except for guarantees relating to human rights.
Earlier on Friday, US intelligence officials told reporters they were increasingly worried about the potential for an economic and political meltdown in Venezuela and predicted Mr Maduro was not likely to complete his term.
Venezuela's opposition is seeking to recall the unpopular leader, 53, amid a worsening crisis that includes food and medicine shortages, frequent power cuts, sporadic looting and galloping inflation.
But the former union leader and bus driver has vowed to stick out his term, and accuses the US of fomenting an undercover coup against him.
He pointed to this week's impeachment of fellow leftist Dilma Rousseff in Brazil as a sign that he is next.
"Washington is activating measures at the request of Venezuela's fascist right, who are emboldened by the coup in Brazil," Maduro said during a Friday night broadcast on state television.
Washington has had an acrimonious relationship with Caracas for years, especially following US support for a short-lived 2002 coup against late leader Hugo Chavez.
Venezuela's ruling Socialist Party has long been a strong ally of Ms Rousseff's Workers Party, however, and her departure adds to Mr Maduro's isolation in Latin America.
Flanked by his ministers and a statue of Mr Chavez, Mr Maduro signed a state of emergency and extended a state of economic emergency to protect the country from foreign and domestic "threats".
Reuters
