With two catches behind, wicketkeeper Mark Boucher overtook Adam Gilchrist and took his tally for test wicketkeeping catches to 401, helping South Africa restrict Bangladesh to 60 for three at the close.

Earlier Skipper Graeme Smith and Neil McKenzie set a world record of 415 for an opening stand.

Shahriar Nafees and nightwatchman Abdur Razzak were not out on seven and eight runs at stumps.

Pace bowler Dale Steyn took all the three wickets for 14 runs to reach 100 Test wickets in just 20 tests.

Steyn took seven wickets in the first Test in Dhaka, where South Africa beat Bangladesh by five wickets.

At the start of Bangladesh's second innings Tamim Iqbal (14) was caught at slip by AB de Villiers off a ninth-over delivery from Steyn.

Boucher caught opener Zunaed Siddique (18) and captain Mohammad Ashraful for a duck off two consecutive deliveries from Steyn, to set his record.

RECORD SURPASSED

Smith was on 231 and McKenzie on 170 in the morning when they surpassed the record of 413 for the opening wicket set by Indian pairing Vinoo Mankad and Pankaj Roy against New Zealand in 1956.

South Africa Resumed on 570 for five after tea and lost Mark Boucher (21) and Robin Peterson (4), left-arm spinner Mohammad Rafique, playing his last international, removing them in consecutive overs to make his Test tally to 100 wickets, a record for his side.

Graeme Smith declared the innings just after Zunaed Siddique caught Peterson at slip off a Rafique delivery. Rafique also removed Boucher, caught at cover.

After spinner Abdur Razzak (1-129) finally broke through in the morning, right-arm pacer Shahadat Hossain (3-107) took three wickets and Shakib Al Hasan (1-68) another in the second session to slow the South African run spree.

Shahadat finally dismissed McKenzie for 226, then trapped Hashim Amla for 38 and bowled Ashwell Prince for two in his two subsequent overs.

Shakib then bowled AB de Villiers for one.

Razzak made the breakthrough in the first session of the day with South Africa's batsmen plundering runs on a flat batting pitch to the frustration of the Bangladesh bowlers.

DOUBLE CENTURIES

It was only the second time a pair of openers had both notched double centuries in a Test.

The first pair to achieve the mark were Australia's William Lawry (210) and Robert Simpson (201) against West Indies in Barbados in 1965.

Smith faced 414 balls, smashing 33 boundaries and one six in his innings.

The opening pair's run spree put South Africa in a strong position to complete a series whitewash after a five-wicket win in the first Test.

On Friday, Smith and McKenzie had piled on the runs to construct a record opening partnership for South Africa, beating the previous mark of 358 against Pakistan in Cape Town in 2003.

It was also the highest opening partnership against Bangladesh by any team, while Smith enjoyed a personal landmark as he became the latest South African to reach 5,000 Test runs.