Victory for the Kiwis gave them an unassailable 2-0 lead in the three-match series.

The tourists found chasing the home side's modest total of 146 under lights at the Big Bowl somewhat of a struggle after part-timer Aftab helped himself to 5-31 -- the best one-day figures by any Bangladeshi bowler.

Eventually the Kiwis, who at one stage were tottering on 125-6, reached their target with 32 balls to spare. Once again it was Chris Cairns that relieved the pressure with a huge six and four off Manzarul Islam. But unlike his power-packed knock in Chittagong, the world-class all-rounder scored a watchful 51-ball 17.

Before Aftab almost derailed the New Zealanders, Matthew Sinclair (62 off 73 balls) and Nathan Astle rattled 74 runs for the opening stand.

Coming in as second change, the medium-pacer had Astle caught by Javed Omar for 29 in his second over. Astle, who pulled Tapash Baisya over square-leg for a six and hit two fours, mistimed a pull to give an easy catch at mid-wicket.

The 19-year-old Aftab trapped Hamish Marshall lbw for two with the last ball of the same over.

Sinclair, who scored fifty off 65 balls, was stumped by Khaled Mashud off Mohammad Rafique.

Man-of-the-match Aftab, bowling for the first time in his fourth ODI appearance, then removed big-hitting Scott Styris' off-stump before winning lbw appeals against Craig McMillan and Brendon McCullum.

The third and final match will be played at the same venue tomorrow but there was bad news for Bangladesh who will miss captain Habibul Bashar who suffered a fracture in his left toe while batting. Earlier, Bangladesh failed to make most of a perfect batting pitch due to the dismal top-order batting.

The Tigers were reduced to 52-5 but Khaled Mashud's 41 gave the total some respectability before they were all out in 43.4 overs.

Kyle Mills, who destroyed the Bangladesh top-order in Chittagong, removed two batsmen in his first over.

Nafees Iqbal edged the medium pacer's second delivery to Styris at second slip before opening his account while Aftab followed in similar style, sneaking the ball behind the wicket to McCullum on four.

There was no respite for the local boys as left-arm pacer James Franklin sent back Habibul Bashar for a 12-ball duck.

Franklin also got the better of opener Javed Omar (12) when the opening batsman while trying to negotiate a yorker, dragged it on to his stumps.

But the slide stopped with a 57-run sixth wicket stand between Rajin Saleh and Khaled Mashud that helped the Bangladesh pass the 100-run mark.

After the match Bangladesh coach Dav Whatmore said, "It was a close finish and I think it was very good for the crowd. We had a disappointing batting show again and if we can't put on a decent total on board, we can never think about winning.

"Our gain from the match was to see the boys fight after scoring a modest total."

Vettori praised the Bangladesh effort.

"We were never under pressure because we had a batsman like Cairns in the wicket. The way Bangladesh defended a small total, was really brilliant."