The NDA is leading in 15 seats,
while the Grand Alliance is ahead in nine constituencies, as per the early trends of counting in Bihar assembly polls.
Official trends showed the BJP is leading in nine seats and its allies JD(U) and Vikassheel Insaan Party in five and one respectively.
The Rashtriya Janata Dal is leading in five seats and its ally Congress in three and the Communist Party of India (Marxist) in one seat.
The Bahujan Samaj Party is leading in one seat.
Counting of votes got underway at 8 am and postal ballots were opened first and these trends are mostly based on these ballots.
Officials said the final results may be delayed a bit this time owing to an increase in the number of polling stations in view of the coronavirus pandemic.