Kiev

Scientists are stationed at the base for one-year stints, with new teams usually arriving in early spring

Swap would come three months after Ukraine carried out a long-awaited exchange with Russia of 35 prisoners each

Putin blames Kiev over incident, warning Ukraine against any further reckless acts

Kiev authorities estimate the number of dead at around 4 million, or 13 percent of the total population at the time

No casualties reported so far

Saakashvili was made governor of the Odessa region in 2015 on the strength of the reforms he carried out in Georgia

Radiation monitoring system at Ukraine's Chernobyl nuclear site has been taken offline

Moscow and Kiev have been locked in a bitter feud since the Kremlin seized Crimea from Ukraine in March 2014

The soldiers were transferred to pre-trial detention on charges of terrorism, waging an aggressive war against Ukraine

IG Warraich accused of overstepping authority, Punjab government likely to intervene.