UPDATE 1-Russian rouble slumps to 2-month low near 83 vs dollar

(Updates prices as of 1421 GMT, adds context in paragraphs 2-3, analyst in paragraph 4, Yandex share move in last paragraph)

By Alexander Marrow

June 8 (Reuters) - The Russian rouble slumped to a two-month low on Thursday near 83 against the dollar, buffeted by geopolitical risks and twitchy oil prices, while exporters' foreign currency conversions only offered limited support.

Russia and Ukraine have traded blame for the bursting of the Soviet-era Kakhovka hydroelectric dam, which sent waters cascading across the war zone of southern Ukraine in the early hours of Tuesday, forcing tens of thousands to flee their homes.

Moscow and Kyiv also accused each other on Thursday of shelling the area as rescue workers in rubber dinghies tried to save people and animals from the still rising flood waters.

"Pressure on the rouble remains due to negative geopolitical news and increased demand for foreign currency," said Bank St Petersburg analysts.

By 1421 GMT, the rouble was 0.9% weaker against the dollar at 82.74, its weakest since April 7.

Some improvement in oil prices restrained the rouble's fall in the previous session, but the selling may intensify on Thursday and the currency could consolidate beyond the 82 mark, said Bogdan Zvarich, chief analyst at Banki.ru.

The rouble had lost 1.6% to trade at 89.07 versus the euro and had shed 1.1% against the yuan to 11.60 , its weakest since April 28 against both currencies.

Brent crude oil, a global benchmark for Russia's main export, was down 0.4% at $76.64 a barrel. Brent has swung between around $72 and $78 this month.

Foreign currency conversion by exporters to pay dividends is a support factor, but FX supply is typically lower earlier in the month as taxes, for which exporters accumulate roubles, are due towards the end of the month.

Russian stock indexes were mixed.

The dollar-denominated RTS index was down 0.6% to 1,029.6 points. The rouble-based MOEX Russian index was 0.4% higher at 2,704.2 points.

Moscow-listed shares in tech giant Yandex were 3.7% higher after it said it had been granted permission to retain its Nasdaq Stock Exchange listing provided the restructuring and divestment of its Russian business is concluded by the end of 2023.

For Russian equities guide see

For Russian treasury bonds see (Reporting by Alexander Marrow; Editing by Sriraj Kalluvila)