Hasina's ruling alliance has won virtually every parliamentary seat in the election, according to official results released on Monday.

The win has given her a third consecutive term despite opposition allegations of intimidation. Hasina earlier served a single term.

The coalition led by Hasina's Awami League party won 288 out of 300 seats - 96 per cent - in Sunday's polls, Election Commission Secretary Helal Uddin Ahmed said.

The opposition alliance led by prominent lawyer Kamal Hossain won only seven seats.

The opposition rejected the outcome, with Hossain calling the election "farcical" and demanding a new election be held under the authority of a "nonpartisan government".

But Chief Election Commissioner KM Nurul Huda ruled out any revote, saying there were no reports of large irregularities.

"There is no scope to hold the election again," Huda said.

He said the turnout in Sunday's vote was 80 per cent.

The political opposition and groups including Human Rights Watch say Hasina has become increasingly authoritarian.

More than a dozen people were killed in election-related violence on Sunday, and the election campaign was dogged by allegations of the arrest and jailing of thousands of Hasina's opponents.

Hasina dismissed questions about the fairness of the vote in a discussion with foreign journalists and election observers at her official residence in Dhaka on Monday.

"I feel that it was a very peaceful election, some incidents took place, some of our Awami League party workers were killed by the opposition," she said.

"I'm very sorry for that, but I always appreciate our law enforcement agencies, also our people who were working hard to have this election in a peaceful manner."

Australian Associated Press