Ukraine faces "grave consequences" from Russia for its decision to sign a trade agreement with the European Union, the deputy foreign ministry has warned.
Grigory Karasin's comments after Ukraine's president Petro Poroshenko agreed a three-year deal with the EU.
Kremlin spokesman Dmitry Peskov said Russia would take measures to protect its economy if it was negatively affected by Ukraine, Georgia and Moldova's agreements.
More top news
Gulf War veteran Paul Briggs' widow, Lindsey, 40, launched legal action to have his life support withdrawn so he could "die with dignity".
Rescue workers are at the site Sunday morning trying to cut open mangled coaches.
Despite chilly temperatures it will be a mostly dry day, and milder than yesterday.