Key developments on April 20:
* Druzhba pipeline ready to resume, Zelensky says, raising hopes of unblocking EU loan
* Ukrainian drones hit key Russian oil hub in Samara Oblast, SBU says
* Fearing Ukrainian troops landing in Crimea, Russia intensifies coastal mining
* Draft officers arrested for kidnapping a man, demanding $30,000 bribe in Odesa; office chief suspended
* Teen recruited by Russia caught while preparing terror attack in Ukraine, SBU says
Oil flows through the Druzhba pipeli