"No one at home and abroad will recognise it as election and through this the Awami League government will appear anew as an illegal structure," Zia, also head of the Bangladesh Nationalist Party-led 18-party opposition alliance, said in a statement.
Zia called upon countrymen to fully boycott the election, terming it a "stigmatised farce".
The least contested election is going to take place in 147 constituencies on January 5 as 153 lawmakers have already been elected uncontested due to the boycott by the BNP-led alliance and other political parties.
"January 5 will be recognised as a black date," Zia said.
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BNP called for the nationwide 48-hour shutdown which will include the polling day in protest against the polls. The strike was called even as the opposition has enforced a non-stop blockade since January 1 to foil the polls.
"In protest against the one-sided election, a country- wide general strike will be observed from 6 am Saturday along with the non-stop blockade," BNP Chairperson's Advisor Osman Faruq said.
"The driver apparently lost control over the wheels as the truck caught fire...It overturned and fell into a roadside ditch," a police officer said, adding that the driver and the trader were burnt to death.
Five makeshift voting centres housed at four schools were set ablaze at Daganbhuiyan area of northwestern Feni, the hometown of BNP chief Khaleda Zia.
The BNP-led 18-party alliance has been demanding Prime Minister Sheikh Hasina's resignation and scrapping of the January 5 polls.