Indian Prime Minister Narendra Modi's party made an unexpected comeback to power Saturday in wealthy Maharashtra state, home to the country's financial capital, after prolonged backroom negotiations saw presidential rule lifted after days of uncertainty.

President Ram Nath Kovind imposed direct rule on India's richest state last week after fiercely fought elections last month led to weeks of haggling between parties over forming a government.

The state was previously ruled by Modi's Hindu nationalist Bharatiya Janata Party and its right-wing regional ally Shiv Sena.

But they failed to agree another power-sharing deal despite results showing the coalition had won a comfortable majority for a second consecutive term.

Shiv Sena quit the partnership, hoping to convince their ideological rivals, the centre-left Indian National Congress, and the Nationalist Congress Party (NCP)to form a government instead.

In the end though the BJP pulled off a major upset by joining hands with a top NCP leader to form a coalition, announcing the deal on Saturday.

"This bolsters the BJP and Modi's image in the state and the country," political commentator Nilanjan Mukhopadhyay told AFP.

"While there were some questions being raised about their loss of dominance following election results, this verdict will cement Modi and BJP's control in the state", he added.

The coalition still needs to prove its majority in the state legislature in a week's time in order to stay in power.

India has been battling an economic slowdown, and the imposition of presidential rule was a setback for Modi and for Mumbai, which is home to business tycoons, the stockmarket and the glitzy Bollywood film industry.