Kieran Powell notched up his second century of the match before the hosts Bangladesh brought alive the first cricket test by grabbing five West Indian wickets in 13.1 overs to raise the spectre of an unlikely victory.
West Indies reached 244-6 at the close on the fourth day, giving them a 215-run lead into the final day but will struggle as the only recognised batsman remaining, Shivnarine Chanderpaul, is unwell and may not be able to bat.
Bangladesh will fancy their chances of notching up their first test win against a top side having scored their highest ever total of 556 in the first innings.
In the morning Bangladesh were dismissed for 556 runs in their first innings, taking a slender 29-run lead over the West Indies first knock of 527 for 4 declared.
