Kumar Sangakkara has become the second batsman in history to score a triple century and a hundred in the same match as Sri Lanka pressed for victory in the second cricket Test against Bangladesh in Chittagong.
The tourists, who led by 161 runs on the first innings, declared their second knock at 305 for four after tea on the fourth day, setting Bangladesh an improbable target of 467 to record a series-levelling win.
The hosts were 12 without loss at stumps with Tamim Iqbal on seven and Shamsur Rahman on four.
Sri Lanka will begin the final day needing 10 wickets to sweep the two-match series, while Bangladesh require another 455 runs in a minimum of 90 overs.