Nato leaders have agreed to boost the military alliance's readiness to meet fresh security threats by setting up a new rapid reaction force.
A preliminary protocol to the ceasefire agreement has been signed between Ukraine and pro-Russian rebels.
Russian Foreign Minister Sergei Lavrov has warned Nato and the US not to offer Ukraine membership of the alliance, ahead of a Nato summit.
Ukraine's president has announced a ceasefire agreement with Russia, shortly before Nato's deadline for a decision on involvement in the region.
The Ukraine crisis is the most serious threat to Euro-Atlantic security since the Cold War, according to Nato head Anders Fogh Rasmussen.
China says the EU's proposed additional sanctions on its key ally Russia will not solve the current problems in Ukraine.
Pro-Russian separatists are preparing a fresh offensive in Ukraine as EU leaders give Moscow one week to curb support for rebels or face sanctions.
Emerging-market stocks are on a winning streak as slow recovery in the developed world offsets concerns over geopolitical tensions.
Francois Hollande has condemned Russia's military presence in Ukraine, while Russia has assured Europe it will keep winter gas supply commitments.
As aid trucks are let in to Ukraine from Russia, problems stir in Parliament with the economy minister resigning, and a likely dissolution looming.
A group of Ukrainian women have been stranded at the Ukrainian border as a dispute over a Russian aid convoy blocks their mission to reach relatives.
The decision to ban most food imports from the West shows that President Vladimir Putin has no intention of bowing to Western pressure over Ukraine.
Ukrainian territory separatist leader Aleksander Borodai has given the black boxes of the plane that downed in the area to Malaysian authorities.
Unrest in Ukraine and the Middle East has seen gold rebound 9.4% this year while the Fed warns benchmark rates could rise sooner than expected.
Ukraine has accused Russia and pro-Moscow rebels of destroying evidence from the wreckage of a Malaysian airliner that Kiev says militants shot down.
US President Barack Obama has warned that the downing of a Malaysian jetliner in Ukraine should be a "wake-up call for Europe and the world".
Barack Obama and Vladimir Putin on Thursday discussed a downed passenger plane during a phone call prompted by a new round of US sanctions.
A Malaysian airliner has been shot down, killing all 295 people aboard, a Ukrainian interior ministry official was quoted as saying by a news agency.
Emerging market stocks fell on Wednesday, led by concern that valuations were overdone.