UPDATE 1-Ukraine, Russia PMs to meet April 29-Ukraine govt

(Adds comment from Russian government)

KIEV, April 15 (Reuters) - Ukrainian Prime Minister Yulia Tymoshenko is to meet her Russian counterpart, Vladimir Putin, in Moscow on April 29, the Ukrainian government said on Wednesday.

A spokesman for the Russian government said the date and time of the meeting was still being agreed.

Relations between the neighbours have been plagued by a series of disputes, especially over Russian gas supplies.

Tymoshenko and Putin are to meet within the framework of an inter-governmental commission on economic issues.

They had been due to meet at the start of April but Russia put off the talks after objecting to a Ukrainian plan to modernise its gas transport system with the European Union.

Tymoshenko last week said she would visit Moscow at the end of April as the two sides had resolved their differences over the network, but the Russian side did not confirm the visit.

Russia denounced a conference in Brussels last month devoted to upgrading the Ukrainian system, which sends Europe about 20 percent of its gas needs.

Tymoshenko asked the EU to allocate $5.5 billion to improve the network rather than embark on expensive alternative routes bypassing Ukraine. Russia said it wanted to be consulted on the project. (Additional reporting by Denis Dyomkin in Moscow)