China Investment Corp, the country's sovereign fund, and Government of Singapore Investment Corp have invested around $500 million each in US-based Cheniere Energy Partners Ltd's planned export plant for liquefied natural gas, a source familiar with the matter told Reuters on Tuesday.

Houston-based Cheniere, which has regulatory approval to build the United States' first LNG export plant in a generation, has been seeking funds to start construction.

News of CIC's deal comes at a time of increased focus on China's investment in the energy sector in North America. Last month, CNOOC Ltd launched an agreed $15.1 billion takeover of Canadian oil producer Nexen Inc, in what is set to be China's biggest ever overseas acquisition.

Cheniere Energy has also seen strong interest from Asia-based institutions. In May, the Singapore state investor Temasek Holdings Ltd and the Asia-based private equity firm RRJ Capital agreed to invest $468 million in the company.

The private equity firm Blackstone Group LP was one of the early backers of Cheniere, when it agreed to invest $2 billion into the company in February.

The Financial Times, which first reported the investment but gave no deal value, said Blackstone advised CIC on the deal. CIC will have no direct influence on Cheniere, the report added. China's $482 billion fund is likely to escape scrutiny with its latest purchase as it is co-investing along with other institutions, the report added.

A CIC spokeswoman declined to comment, while Blackstone and GIC were not immediately available for comment. The source declined to be identified as the details of the deal were not public.

Reuters