"We strongly condemn Russia's continued and deliberate destabilisation of eastern Ukraine in breach of international law," said a statement from the NATO ministers and Ukraine's Foreign Minister Pavlo Klimkin, who attended by videoconference.
NATO chief Jens Stoltenberg said they agreed to activate four trust funds which will help pay to upgrade Ukraine's logistics, cyber warfare, command and control and medical services, and added a fifth to support wounded Ukrainian soldiers.
"Russia must use its influence over the separatists to ensure they stop their attacks and abide by the ceasefire," the statement said, referring to the earlier deal.
A NATO official said "implementation is key" to any new ceasefire.
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EU foreign affairs head Federica Mogherini, attending the meeting, said that if confirmed, the new truce accords "would obviously be very good news."
At a September summit NATO leaders agreed to launch a "spearhead" force of around 4,000 troops by 2016 -- but on today they were discussing plans for an even faster, smaller force to be operational by early 2015.
Norway's Stoltenberg, who took over from Denmark's Anders Fogh Rasmussen as NATO chief on October 1, said the ministers aimed to agree on how to "drive our alliance forward in a changing world," ready to "deal with any challenges from the east or from the south."
The question of NATO membership for Ukraine was strictly off limits, diplomatic sources said.