Dale Steyn and Johan Botha took three wickets apiece as South Africa moved to the verge of victory over West Indies by the end of the third day of the third Test in Bridgetown.

The visitors reduced their hosts to 134 for seven in their second innings, a lead of only 19 runs.

Only Shivnarine Chanderpaul provided any real resistance, ending the day unbeaten on 57, his knock coming off 156 balls and including six boundaries.

West Indies had earlier bowled the tourists out for 346, a lead of 115, Ashwell Prince making an unbeaten 78 and Sulieman Benn finishing with career-best figures of six for 81.

Steyn then ripped through the hosts' top order, removing Dale Richards (17) and Narsingh Deonarine (zero) in successive balls and then sending Chris Gayle packing for 10 as the home side slumped to 36 for three.

Steyn struck in the fifth over to dismiss Richards, caught at square-leg by Alviro Petersen. Deonarine followed first ball, Prince taking the catch at short cover point, before Gayle edged another Steyn delivery behind to Mark Boucher to leave West Indies rocking.

Chanderpaul and Brendan Nash steadied the ship but the loss of the latter, caught at first slip by Jacques Kallis off Botha for 12, sparked another mini collapse.

Shane Shillingford joined Chanderpaul and stopped the rot temporarily with 25, including a six, before he was trapped lbw by Botha. Benn replaced him at the crease and was still there on four at the close.

Prince had earlier finished unbeaten on 78 as South Africa established a healthy first-innings lead. Prince, who had started the day on 55 not out, saw four partners fall as South Africa moved their score on from 285 for six overnight.

Boucher's was the first wicket of the day to fall, as the wicketkeeper was run out attempting a quick single while on 17.

Botha and Steyn followed him to the pavilion without reaching double figures, Benn taking his fifth wicket of the innings to trap Botha lbw.

Kemar Roach bowled Steyn off his pads for four as West Indies looked to polish off the South African tail quickly and they completed the job when Morne Morkel, having added nine, became Benn's sixth victim.