Attorney to US president Donald Trump, Rudy Giuliani   attacked the anonymous whistleblower at the centre of the impeachment process and the Democrats leading it. Photograph: EPA

Donald Trump’s army of surrogates, led by his personal lawyer Rudy Giuliani, went into battle on Sunday as the beleaguered president sought to fight b(...)

MSD said its computer network had been compromised as part of a global hack. Photograph: Erdem Sahin/EPA.

IT systems at the Irish operations of three international companies were affected by a major new global cyber attack on Tuesday. US pharmaceutical co(...)

German Chancellor Angela Merkel says the Ukraine government cannot defeat Russia militarily in their conflict over the eastern part of the country. Th(...)

Train wagons are seen on the destroyed railway bridge which collapsed during the fighting between the Ukrainian army and pro-Russian separatists, over a main road leading to the eastern Ukrainian city of Donetsk. Photograph: Reuters

Further violence in Ukraine marks a dangerous escalation, but there is no way of verifying the latest reports of a Russian invasion, a top UN official(...)

Tánaiste  Eamon Gilmore: ‘We are monitoring the situation very carefully, particularly in eastern Ukraine. There is an urgent need for a de-escalatation of the crisis and for Moscow to engage in serious dialogue with Ukraine’s interim government.’ File photograph: The Irish Times

There was “a degree of coordintion” behind events in Ukraine over recent days during which pro-Russia elements seized control of state owned bu(...)

Armed men, believed to be Russian servicemen, take cover behind an armoured vehicle as they attempt to take over a military airbase in the Crimean town of Belbek near Sevastopol yesterday. Photograph: Shamil Zhumatov/Reuters

Russian forces gathering on the border with eastern Ukraine may be poised to invade, the White House warned today, as the government in Kiev said t(...)

 Protesters clash with riot police during their protest in  Kiev, Ukraine last night. Photograph: Sergey Dolzhenko/EPA

Protesters clashed with riot police in the Ukrainian capital overnight after tough anti-protest legislation, which the political opposition says paves(...)