The NPP has won six seats and was leading in 19 other constituencies as counting of votes polled in the February 27 polls was underway.
The exit polls further pointed out that the northeastern state would have a hung house, with Sangma's National People's Party (NPP) emerging as the single-largest party.
The first election that the US and UK-trained Conrad Sangma, who now runs the National People's Party (NPP) formed by his father PA Sangma, fought in 2004 had resulted in a narrow defeat.
Sangma will go to Raj Bhawan at 11:30 am on Friday and meet the governor to apprise him of the assembly election results, the official said.
Sarma, who heads the Bharatiya Janata Party-led North East Development Alliance (NEDA), met Sangma at a hotel in Guwahati on Tuesday night, they said.
The Bharatiya Janata Party and its allies are well on the way to power in two north-eastern states, and is almost certain to be part of the ruling dispensation in the third.
Post-poll violence that erupted in at least three assembly constituencies in Meghalaya left several people injured, while one person was found dead in a mysterious circumstance, officials said on Friday.
'Someone who cannot even take his cabinet into confidence, how will he take the NDA alliance into confidence?'
'Discussions are on' within the saffron camp, and a final decision on whether to come out of the ruling coalition or not will be taken in one month, he claimed.
Prime Minister Narendra Modi and Home Minister Amit attended the swearing in ceremony as did BJP president J P Nadda.
The high-level committee on 'one nation, one election' approached 62 parties out which 47 responded -- 32 in support of holding elections simultaneously, 15 against it.
In a letter to Governor Anusuiya Uikey, KPA president Tongmang Haokip informed about the party's decision to snap ties with the Bharatiya Janata Party-led government in Manipur, where ethnic rioting since the last three months has claimed more than 160 lives.
The election was held on May 10, as voting was adjourned due to the death of UDP candidate HDR Lyngdoh ahead of the assembly polls on February 27.
Uncertain political times in Meghalaya, Nagaland, Tripura.
A coalition government, led by National People's Party leader and outgoing chief minister Conrad Sangma, will be sworn-in on Tuesday morning in Meghalaya, while an all-party government, led by Nationalist Democratic Progressive Party (NDDP's) Neiphiu Rio will take oath later in the day in Nagaland.
The ruling Bharatiya Janata Party managed to notch up a morale-boosting win on its 'Mission Northeast' on Thursday by retaining Tripura emphatically, despite anti-incumbency and newcomer Tipra Motha playing spoilers to its party, while also piggy-backing to power in Nagaland on Neiphiu Rio-led NDPP's shoulder.
Sarma, whose stock is high in Delhi had earlier captured eyeballs as the BJP's first star campaigner from the region in far away Gujarat and Delhi.
Conrad Sangma will take the oath of office as the chief minister of Meghalaya for a consecutive second term on March 7.
Ukraine Foreign Minister said Dmytro Kuleba claimed that the Russian army is firing from all sides upon Zaporizhzhia NPP.
The three state assemblies have a strength of 60 members each.
Prime Minister Narendra Modi will be on a two-day visit to the North East from Tuesday, during which he will attend the oath-taking ceremonies of new governments in three states of the region.
Thomas A Sangma of the ruling National People's Party-led Meghalaya Democratic Alliance (MDA) coalition was on Thursday elected as the speaker of the 11th Meghalaya assembly.
Exit polls by various channels predicted a hung house in Meghalaya, a win for the NDPP backed by the BJP in Nagaland, the two states that went to polls on Monday, and seemed to oscillate between predicting a clean sweep for the BJP to a hung house in the state of Tripura, where a new party the Tipra Motha may emerge as a potential king-maker in the polls, held a week back.
They will, however, remain in the Congress, Congress Legislature Party (CLP) leader Ampareen Lyngdoh said.
Putin also told his French counterpart that Kyiv does not comply with the agreements reached with Moscow on the evacuation of civilians from combat areas, the Kremlin said.
Bihar Chief Minister Nitish Kumar's Janata Dal-United on Wednesday described as "high indiscipline" and "arbitrary" the support extended by its Nagaland unit to the newly formed government in that state where the Nationalist Democratic Progressive Party-Bharatiya Janata Party alliance returned to power.
The Chernobyl nuclear power plant, which was taken over by Russian forces last month, has stopped transmitting data to the International Atomic Energy Agency (IAEA), the United Nations atomic watchdog has said, expressing deep concern for the staff working under Russian troops at the nuclear site in northern Ukraine.
A total of 517 candidates have withdrawn their candidature till on Monday, even as parties faced "rebel trouble" in several segments.
Over 83 per cent of the more than 13 lakh electorate cast their vote on Monday in the single-day Nagaland state election which passed off by and large peacefully, Chief Electoral Officer V Shashank Shekhar said.
The sports department of Meghalaya denied permission to the Bharatiya Janata Party to host an election rally of Prime Minister Narendra Modi at the PA Sangma Stadium in Chief Minister Conrad K Sangma's home constituency of South Tura, citing construction work at the venue.
Marak had laid down arms in 2014 and disbanded the ANVC-B militant group.
Governor La Ganesan and Chief Minister N Biren Singh were among the early voters in their respective constituencies of Sagolband and Heingang.
Now, the chief minister is under pressure to make good his promise after the December 4 incident in Nagaland's Mon, where 14 people were killedAFSPA has eclipsed all other achievements of the Biren Singh government.
The Chernobyl nuclear power plant's personnel are continuing to service the facilities and monitor the radiation situation at the station as usual, a top Russian official claimed on Friday, a day after Russian forces took over the decommissioned facility after a fierce fight with Ukrainian soldiers guarding it.
Though embattled Biren Singh has survived the crisis, media reports suggest that restructuring of the cabinet will not be an easy task for him.
He said politicians should work for non-political causes as well as they have a lot of impact on society. In this context, Modi noted the Gujarat government's work for "beti bachao" (save daughters) when he was the chief minister and said it helped a lot in improving the gender ratio.
The ruling Nationalist Democratic Progressive Party (NDPP) and the Bharatiya Janata Party are contesting the polls on a 40:20 seat-sharing basis.
The bypolls were conducted for two Assembly seats in Uttar Pradesh, one each in Meghalaya and Odisha and the Jalandhar Lok Sabha constituency in Punjab.
Polling for assembly polls is underway in Meghalaya and Nagaland, northeastern states the Bharatiya Janata Party rules in alliance with regional powers.
'...despite not being ideologically aligned with a vast section of the people of the north east.' 'But the results in Tripura, Nagaland and Meghalaya show that no party, including the BJP, can say that it has really done well.'