UPDATE 1-Thai Beverage eyes stakes in SE Asia drinks firms

* Eyes stakes in Singapore, Thailand, Philippines

* Wants international revenue to be third of total revenue (Updates with details, quote)

SINGAPORE, Aug 21 - Singapore-listed Thai Beverage , Thailand's largest brewer, is looking at acquiring stakes in beverage firms in Thailand, Philippines and Singapore, an executive said on Friday.

"We are working on four due diligences on beverage firms -- two in Singapore, one in Thailand and one in the Philippines," Sithichai Chaikriangkrai, a finance director at the firm, told Reuters in Singapore.

He declined to give the names of the firms or the size of the stakes.

Philippine firm San Miguel Corp PS> said earlier this month it is in talks with foreign groups to sell a substantial stake in its liquor arm Ginebra San Miguel Inc in coming months.

Beverage firms listed in Singapore include Del Monte Pacific , Fraser&Neave and Asia Pacific Breweries .

Thai Beverage has diversified into non-alcoholic drinks and restaurants, from its original beer and spirits businesses. It makes Chang beer, Mekhong whisky and Oishi green tea.

Sithichai said Thai Beverage had also been approached by global investment banks, namely Barclays , Goldman Sachs , JPMorgan and Royal Bank of Scotland , to acquire beverage firms in Russia, India, Sri Lanka and China.

"Our goal is to have international revenues to account for a third of our revenues in three years, from about 5 percent now," Sithichai said.