A Russian Internet-investment group, Digital Sky Technologies, has offered to invest $200 million in Facebook Inc, The Wall Street Journal reported today. 

According to the newspaper it was unclear whether Facebook had responded to or decided to accept the offer.

The deal, if it takes place, will value the social networking site at $10 billion.

The offer comes as the social-networking company has been talking to a range of venture-capital and private-equity firms about raising more money to help fuel its growth, the report said.

Facebook chief executive Mark Zuckerberg told the Reuters Global Technology Summit this week that, "If there's an investment to be done on very good terms, we will consider it if for no other reason than to have more buffer if we want to do something in the future."

The DST proposal is the latest in a string of funding offers Facebook has received, according to WSJ.

Under the terms of DST's two-part offer, the Russian investment group would also offer to buy between $100-150 million in Facebook common stock at a $6.5 billion valuation, the paper said.

The amount, which would likely be used to buy up some Facebook employees' shares in the company, would depend on how many employees were interested in selling their shares, The Journal pointed out.

Facebook last got funding from Microsoft Corp in 2007, when the software company paid $240 million for a 1.6 per cent stake in the company.

Facebook is a social utility that connects users and solve real-world problems with your applications. Build a business by offering users experiences. It has about 200 million active users, double the number it had last August.

The company also ranks as one of the top photo-sharing websites, with more than 15 billion pictures uploaded onto its service.