Brazil's President Dilma Rousseff vetoed divisive elements of a new law that relaxes the forest cover farmers must preserve on their land, taking a stand against the agricultural lobby that pushed a more lenient version through Congress.
Guatemalan police arrested a former attorney general on Thursday on charges that include money laundering.
The mystery surrounding the deaths of at least 877 dolphins in Peru deepened as the government said human activity was not to blame but failed to pinpoint a natural cause for the massive die-off.
Venezuelan President Hugo Chávez reappeared in a live television broadcast, the first time he has been seen in public view since returning from cancer treatment in Cuba almost two weeks ago.
Ruling party candidate Danilo Medina claimed victory on Monday in the Dominican Republic's hotly disputed presidential election, avenging his defeat 12 years ago by opposition candidate Hipolito Mejia.
Mexican soldiers have arrested an alleged perpetrator of the massacre of 49 people whose corpses were decapitated, dismembered and dumped on a highway last week.
Peruvian President Ollanta Humala's approval rating fell to 51 percent in May due to public outrage over deadly clashes between security forces and Shining Path rebels, an Ipsos Apoyo poll showed.
Thousands of demonstrators protested in Mexico City on Saturday against opposition presidential candidate Enrique Pena Nieto, who is far ahead in polls and poised to lead the party that ruled Mexico for much of the 20th century back to power.
Venezuelan President Hugo Chávez ended a weeklong silence after his latest cancer treatment with a call to state television, singing a folk song and vowing to deepen his self-styled socialist "revolution."
An oil spill was discovered off Brazil's coast near the country's Espirito Santo state, Brazil's Navy said the latest in a series of spills that have raised questions about the safety of a massive expansion of the country's oil production capacity.