The Indian cricketers reached 122 for one in their second innings before bad light stopped play again on the third day of the first test against Bangladesh in Chittagong.
They lead by 123 runs after taking a slender one- run advantage in the first innings.
Bangladesh had looked set to overhaul India's total of 243 when Mahmudullah (69) and Mushfiqur Rahim (44) added 108 runs for the seventh wicket.
But just as the hosts had suffered a top-order collapse when they tottered on 98 for six before lunch, they surrendered their last four wickets for just 36 runs.
