Brazil, one of the world's fastest-growing economies, grew by less than expected in 2011.
The Latin American nation's economy grew 2.7% last year, official figures show, less than the 2.8% predicted.
Huge explosions at an arms depot, which killed at least 146 people in Congo's capital, Brazzaville, were caused by a short-circuit that led to a fire, government officials say.
They say some 1,500 people were hurt.
At least 27 people have been killed after more than six dozen severe storms and tornadoes struck several states in the central US, authorities say.
Homes were flattened, schools and business smashed and vehicles and trees tossed aside by Friday's storms.
Two-thirds of China's cities will fail to meet new air quality standards, a senior environment official says.
The comments from Vice-Minister of Environmental Protection Wu Xiaoqing came two days after the Cabinet announced revised monitoring standards which will come to effect in 2016.
Drug-related violence is at "alarming" levels in Central America and poses a threat to the region's security, the UN drugs watchdog says.
The International Narcotics Control Board (INCB) also said Honduras, Costa Rica and Nicaragua had become major transit countries for traffickers.
James Ibori, a former governor of one of Nigeria's oil-producing states, has pleaded guilty in a UK court to 10 counts of money-laundering and conspiracy to defraud.British police accuse him of stealing £250m ($400m) over eight years. Mr Ibori, once seen as one of Nigeria's wealthiest and most influential politicians, was arrested in 2007.