But Awal said the lack of genuine political opposition to Hasina meant that the vote itself was conducted with integrity.
“The main opposition party BNP and like-minded parties didn’t participate,” he said.
“As it was a one-party election, there was no necessity to influence the election.”
Hasina’s 15-year rule saw widespread human rights abuses, including the mass detention and extrajudicial killings of her political opponents.
She fled to India by helicopter last month, where she remains, and was replaced by Nobel Peace Prize laureate Muhammad Yunus, who is heading an interim government.
Yunus faces the monumental task of charting democratic reforms after years of repression but his caretaker cabinet has yet to give an indication of when fresh elections will be held.
Senior bureaucrats who quit their posts last month had been given ultimatums to do so by leaders of the student protests which toppled Hasina.