The talks stalled when the US opened up freezing Russian assets, selling a stake in Lukoil and resuming Belarus' potash exports, the NYT reports. Ukraine balked, demanding security guarantees and more military aid.

The talks stalled when the US opened up freezing Russian assets, selling a stake in Lukoil and resuming Belarus' potash exports, the NYT reports. Ukraine balked, demanding security guarantees and more military aid.