By Pedro Fonseca and Brad Brooks RIO DE JANEIRO/SAO PAULO (Reuters) - Jailed members of Brazil's most powerful drug gang killed 31 inmates at a penitentiary on Friday, decapitating and cutting out the hearts of most of them, in revenge for a separate prison massacre that left 56 dead this week.

By Jonathan Stempel (Reuters) - The leader of a 2004 coup that toppled Haitian President Jean-Bertrand Aristide, and who had been wanted for more than a decade by U.S. authorities, was charged on Friday in the United States with engaging in drug trafficking and money laundering conspiracies.

LAGOS (Reuters) - A Nigerian militant group, which has claimed a wave of attacks on oil pipelines in the Niger Delta, said on Friday that it had asked its fighters to prepare to fight the "enemy" as authorities were not ready for dialogue.

ANKARA (Reuters) - Turkey dismissed more than 6,000 more police, civil servants and academics under emergency rule on Friday, continuing a purge in the wake of a failed coup last July, according to decrees issued in the Official Gazette.

AMMAN/BEIRUT (Reuters) - A senior Syrian rebel official denied a report on Friday that a ceasefire had been reached between rebels and government forces in the Wadi Barada area near Damascus, where bombardments have knocked out the capital's main water source.

By Julia Edwards Ainsley and Susan Cornwell WASHINGTON (Reuters) - U.S. President-elect Donald Trump said on Friday Mexico would repay the United States for his planned border wall, a day after news emerged that his transition team was exploring getting the Republican-led Congress to vote to approve the funding.

SEJONG, South Korea (Reuters) - China is suspected to be taking indirect action against South Korea's decision last year to deploy a U.S. anti-missile system, South Korea's finance minister said. China worries that the U.S. Terminal High Altitude Area Defence (THAAD) system's powerful radar can penetrate its territory and it has objected to the deployment.

BEIJING (Reuters) - China has vowed to give no quarter in handling election fraud in the upcoming central Communist Party congress to decide on its future leadership, warning cadres to learn from past political scandals.

By James Pearson SEOUL (Reuters) - South Korea's newest celebrity took an unusual route to the nation's TV screens - years spent working his way up through the ranks of North Korea's diplomatic corps, followed by months secluded in the custody of the rival South's spy agency.

(Reuters) - British Prime Minister Theresa May will meet with Donald Trump in Washington in the spring, a representative said, in the first visit with the new president by the leader of one of the United States' closest allies.