Russian troops enter key Ukraine city Kharkiv

Russian troops have entered the Ukrainian city of Kharkiv with the United Nations refugee agency saying thousands of people have fled the country since the start of the Russian invasion. Many have fled west, to cities such as Lviv crossing the border onto to Poland, Romania, Hungary, and Slovakia.

Also in the programme: a look at how the conflict in Ukraine is affecting the wider region.

Anna Holligan is joined by two guests to discuss the unfolding war in Ukraine: Olga Oliker is the Program Director, Europe and Central Asia for the International Crisis Group and Orysia Lutsevych, the Head of Ukraine Forum, Russia and Eurasia Programme at Chatham House.

(Photo: Armed men, believed to be Russian servicemen, drive an armoured vehicle onto the territory of a military airbase as they attempt to take over in the Crimean town of Belbek near Sevastopol March 22, 2014. REUTERS/Shamil Zhumatov)