India's Narendra Modi clinched a historic third consecutive term as prime minister on Friday, elected by lawmakers of his National Democratic Alliance (NDA) as the country reverts to coalition governance.

Modi is scheduled to meet with President Droupadi Murmu later in the day to present his claim to form a new government, with a spokesperson for one of his allies confirming his swearing-in for Sunday evening.

This marks the first time in a decade that Modi's Bharatiya Janata Party (BJP) has relied on regional party support to secure government formation.

The party, which had a handsome majority in the previous two terms, secured only 240 seats in the lower house of parliament, far short of the 272 needed to govern on its own.

The NDA won 293 seats in the 543-member Lok Sabha, and the India alliance, led by Rahul Gandhi's centrist Congress party, won more than 230 to exceed forecasts.

Lawmakers from the BJP and its allies, including the Telugu Desam Party (TDP) and the Janata Dal (United), voted unanimously for Modi to become the leader at the alliance's first meeting after the June 4 vote count and declaration of results.

Modi's name was proposed by outgoing Defense Minister Rajnath Singh and seconded and backed by other outgoing ministers and leaders of parties in the alliance.

Newly elected lawmakers and senior alliance leaders thumped tables and applauded to back his candidacy, with some standing and chanting "Modi, Modi!" in the central hall of the old parliament building.

The swearing-in ceremony for the prime minister is scheduled for Sunday evening, a TDP spokesperson told Reuters.

Indian media said both BJP allies are eyeing the post of the speaker in the lower house, while the party itself is expected to retain four key ministries - foreign affairs, defense, home and finance.

The coalition negotiations are a throwback to an era before 2014, when Modi swept to power with an outright majority for his BJP, as alliance partners haggled for positions and benefits.