National Assembly president Juan Guaido, his wife and several lawmakers were arrested in Venezuela.
Venezuela's President Nicolas Maduro begins a new six-year term. Opponents, at home and abroad, seek to weaken his rule.
Maduro won a popular vote in May, but his re-election has been dismissed as illegitimate by the opposition and much of the international community.
Venezuelan Foreign Minister Jorge Arreaza says "nothing or nobody will be able to prevent" the swearing in of President Nicolas Maduro on January 10, after the 14-member group, without Mexico, said it won't recognise Maduro's new government.
Tehran sees the presence of US aircraft carriers in the Gulf as a security concern and its navy has sought to counter that by showing the flag near American waters.
The Venezuelan health system is suffering as a result of the country's economic crisis.
The crisis is affecting the nation's pets with more than three million cats and dogs abandoned in the country, animal protection organisations say.
Except for Qatar, the oil producing gulf countries are adamant on raising oil prices to fill budget deficits.
The United States has the second highest death rate by firearms globally. Now guns are also affecting a significant number of children.
The Venezuelan chief prosecutor's office says Nelson Martinez suffered from a serious and chronic illness that led to his death at a medical facility where he was undergoing treatment.
Moscow recently deployed two nuclear-capable bombers in Venezuela, triggering widespread speculation that the country was ready to face any military challenge stemming from the US.
The bombers' deployment follows Venezuelan President Nicolas Maduro's visit to Moscow last week in a bid to shore up political and economic assistance.
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