Venezuelan President Hugo Chavez's referendum win puts him closer to his goal of ruling for another decade or more.
At least three officers and four civilians were killed when a police patrol was ambushed by an armed group.
The U.N. refugee agency said that Colombia should investigate the killings of a group of indigenous people.
Battered by military setbacks, Colombia's FARC rebels are freeing hostages in an attempt to gain political ground.
Colombia's FARC rebels freed a former politician held hostage for more than seven years.
Venezuela's Pres. Chavez is firing up voters before a referendum on his ambition to rule the country indefinitely.
Bolivia's president wants to change the constitution so he can run for another term in office.
Venezuelans vote next month in a referendum that would allow Pres. Hugo Chavez to govern for as long as he wins elections.
The final death toll in Costa Rica from a strong earthquake last week will likely rise to around 40.
Rescue helicopters ferried stranded tourists from an area in Costa Rica where a strong earthquake killed around a dozen.