New Russia-Ukraine gas row threatens Europe again?
Ukraine is raising the issue of intermediaries in gas sales and is believed to be looking for a five fold increase in transit fees.
This comes as Gazprom has announced that a shortage of central Asian gas is forcing it to supply Ukraine with more expensive Russian gas.
The Ukrainian delegation will be met in Moscow with a new debt claim of $US 830 million.
Analysts say that it is not in the interests of Gazprom and Ukraine's economy for problems to escalate.