The G-20 group of nations has reportedly agreed on granting permanent membership to the African Union akin to that of the European Union.

The move would give the African Union, a continental body of 55 member states, the same status as the EU, up from its current designation of "invited international organization," according to Bloomberg News.

However, two Indian sources told Reuters that membership for AU would only be formalized next year when Brazil takes over the helm of the group of the world's biggest economies from India.

There is no opposition to the move from within the G-20, one of the sources said, speaking on condition of anonymity citing government rules.

Indian Prime Minister Narendra Modi wrote to the leaders of the G-20 nations in June proposing the AU be given full, permanent membership of the bloc at the upcoming summit in the Indian capital.

In an article published across Indian and international newspapers Thursday, Modi wrote, "Our presidency has not only seen the largest-ever participation from African countries but has also pushed for the inclusion of the African Union as a permanent member of the G-20."

The G-20 currently comprises 19 countries and the European Union. The members represent around 85% of global gross domestic product (GDP), over 75% of global trade, and about two-thirds of the world population.

South Africa, which is a G-20 member and has supported the admission of the AU, declined immediate comment ahead of the Delhi summit. South African presidential spokesperson Vincent Magwenya said: "We wouldn't comment now until the official announcement or post the summit."

A South African foreign ministry spokesperson welcomed the news report about the G-20 agreeing to make the African bloc a member along the lines of the EU. "The EU is also a member. We (South Africa) lobbied for and supported this move."

G-20 leaders are expected to announce the decision during the summit, the Bloomberg report said.

Countries like Germany, Brazil, South Africa and Canada have also voiced support for African Union membership.