After two weeks of tense stand-off, clashes broke out between militants of the Kurdistan Workers' Party (PKK) and Kurdistan Democratic Party of Iran (KDPI) on the Iran-Iraq border May 24, with at least two KDPI fighters reported killed. Fighting was reported in the Iraqi border villages of Kelashin, Khenela and Saqar. The dispute started when a KDPI force deployed to the border on May 10 to establish a base in areas where the PKK was already entrenched.  The PKK have now surrounded the KDPI forces in the area. With more than 5,000 militants spread across the area, the PKK is in virtual control of the borderlands between Iran, Iraq and Turkey.  The KDPI is the Iranian wing of Iraq's Kurdistan Democratic Party (KDP), loyal to Masoud Barzani. (Rudaw, BasNews, Doğan News Agency, May 24)

Colombia's President Juan Manuel Santos on May 9 called upon his National Drug Council to halt the spraying of glyphosate on suspected coca fields following its recent reclassification as a carcinogen by the World Health Organization. The decision to put an end to 20 years of the US-backed aerial spraying was applauded by leaders of the FARC guerillas. The spraying has long been opposed by the FARC as well as by Colombia's peasant communities. Santos' announcement came one week after government representatives and FARC leaders met in Havana for the 35th round of peace talks—this time to focus on justice and restitution for victims of Colombia's long civil war. (Colombia Reports, May 10; Prensa Latina, May 3)

The 2015 Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) concluded at the UN in New York on May 22 without approving a final document—due to US blocking of a provision on creating a Middle East nuclear-free zone. The US blocked the document, saying Egypt and other Arab states tried to "cynically manipulate" the process by setting a March 2016 deadline for Middle East nations to meet on the proposal—including Israel. The US was joined by the UK and Canada in blocking the document. Israel's Prime Minister Benjamin Netanyahu thanked US Secretary of State John Kerry for blocking. Israel of course had no vote, as a non-signatory to the NPT. (AP, Interfax, The Guardian, May 23; Xinhua, May 22)

China's Premier Li Keqiang, on a tour of South America, is plugging a transcontinental railway project that would cut through the heart of the Amazon rainforest. Last year, President Xi Jinping signed a memorandum on the project with the governments of Brazil and Peru, and Li is now pressing for an actual feasibility study. According to an interactive map on Diálogo Chino website, the "Twin Ocean Railroad" or "Transcontinental Railroad" would start at Porto do Açu in Rio de Janeiro state, and cut through the Brazilian states of Goiás, Mato Grosso and Rondônia. It would terminate at Puerto Ilo in Peru's southern Moquegua region.

ISIS forces are in control of most of Moammar Qaddafi's hometown of Sirte, and this week sucessfully repulsed an effort to retake the town by the Misrata-based 166 Brigade, which is aligned with the Libya Dawn rebel coalition that holds power in Tripoli. The 166 Brigade was reportedly pushed to the west after launching an attack on Nufaliya, and ISIS-held town on the outskirts of Sirte. ISIS claims to have taken 166 Brigade camps south and east of Sirte, and posted photos of what it says is seized equipment.

Maya indigenous peasants in Mexico's southern state of Chiapas are marching cross-country to oppose violence by the local narco gangs and the corruption of local authorities that protect them. The "pilgrimage" left the rural town of Simojovel some 15,000 strong at the end of March, and is now arriving at the state capital Tuxtla Gutiérrez, some 240 kilometers away through rugged country. The pilgrimage was organized by the Catholic pacifist group Pueblo Creyente (Faithful People) with the support of the local diocese of San Cristóbal de Las Casas in response to a wave of narco-violence in Simojovel.

The Iraqi city of Ramadi fell to ISIS over the weekend, sending 25,000 residents fleeing. Government forces defending the city reportedly abandoned their positions after days of intense fighting. Prime Minister Haider al-Abadi has called up Shi'ite militias to re-take the city. A broad front of Shi'ite militias is operating under the umbrella of the Popular Mobilization Units or Hashed al-Shaabi. the Anbar Provincial Council said Sunni tribal militias would also join the offensive to retake the city. (BBC News, Reuters, IraqNews, BasNews)

Grupo Mexico's Southern Copper Corp on May 15 announced a 60-day halt in its huge Tia Maria project in southern Peru's Arequipa region following seven weeks of escalating protests in which three people have been killed and more than 200 injured. Company president Oscar Gonzalez said in a statement that the "pause" would let all sides air concerns and "identify solutions." Protesters in Cocachacra, the center of the conflict in Islay province, say they have no intention of backing down from their demand that the $1.4 billion project be canceled. Peru's President Ollanta Humala said canceling the project would expose the country to lawsuits and make it less attractive to investors.