Women hold portraits of their lost husbands near a monument honouring people who were killed during cleanup efforts after the Chernobyl nuclear power plant disaster,  in Kiev, Ukraine on Tuesday. Photograph:  Sergey Dolzhenko/EPA

Ukraine, Belarus and Russia have marked 30 years since the Chernobyl atomic power station exploded, and paid tribute to hundreds of thousands of worke(...)

Ukrainian pilot Nadezhda Savchenko. She was sentenced last month to 22 years in prison in Russia over her alleged role in the deaths of two Russian journalists. Photograph: AP Photo/Ivan Sekretarev

Ukrainian president Petro Poroshenko said on Tuesday he and Russian counterpart Vladimir Putin had agreed a framework for a deal to secure the release(...)

Ukraine’s newly appointed prime minister, Volodymyr Groysman (left), is greeted by President Petro Poroshenko  at the parliament in Kiev on Thursday, after months of political gridlock. Photograph: Genya Savilov/AFP/Getty images

Ukraine’s new prime minister has vowed to reinvigorate its pro-EU reform drive, despite immediate doubts over the stability of his government and clai(...)

A broadcast of Russian president Vladimir Putin’s annual televised call-in question-and-answer show is watched by journalists in Moscow on Thursday.  Photograph: Alexander Nemenov/AFP/Getty Images

Russian president Vladimir Putin has dismissed reports that billions of dollars in Panama offshore accounts might be linked to him as a US-backed “pro(...)

Ukrainian parliament speaker Volodymyr Groysman was expected to be appointed prime minister, but negotiations dragged on all day without yielding agreement on a full list of cabinet ministers. Photograph: Gleb Garanich/Reuters

Ukraine stumbled closer to snap parliamentary elections on Tuesday, as its ruling parties failed to form a new government amid increasingly tense talk(...)

Volodymyr Groysman:  his expected appointment as prime minister would foster greater cohesion between president and government, but also raise fears of an unhealthy concentration of power. Photograph: Genya Savilov/AFP/Getty Images

Ukraine’s parliament may vote to appoint a new prime minister on Tuesday, as it seeks to end a period of political paralysis amid rising public discon(...)

Dutch prime minister Mark Rutte: Dutch voters rejected the trade deal by almost two to one. in Photograph: Saul Loeb/AFP/Getty Images

The European Union has pledged to continue its engagement with Ukraine, despite the decisive rejection of an EU-Ukraine association agreement by Dutch(...)

First vice-president of the European Commission Frans Timmermans (L) casts his vote in the Dutch referendum on the association agreement between the EU and Ukraine in Heerlen. Voters rejected the treaty by a 64-36 margin. Photograph: Marcel van Hoorn/Getty Images

Dutch voters have overwhelmingly rejected a Ukraine-European Union treaty on closer political and economic ties, in a rebuke to their government and (...)

Mossack Fonseca is the law firm at the centre of the Panama Papers leak, which lifted the lid on how offshore companies are used by the global elite to conceal the ownership and control of assets and property worth billions. Photograph: Carlos Jasso/Reuters

1. Twelve national leaders are among 143 politicians, their families and close associates from around the world known to have been using offshore tax(...)

Iceland’s prime minister Sigmundur David Gunnlaugsson  speaks during a parliamentary session in Reykjavik on Monday. Photograph: AP Photo/Brynjar Gunnarsson

Iceland’s prime minister Sigmundur David Gunnlaugsson is to resign, becoming the first casualty of leaked documents from a Panamanian law firm which h(...)