Enamul, who bagged a career-best 6-45 in the port city to spearhead Bangladesh to their maiden Test victory on January 10, took the first four wickets as Zimbabwe slumped to 111-4 midway through the post-lunch session.

But skipper Tatenda Taibu, who elected to bat first, was involved in two significant partnerships with Hamilton Masakadza ( 43 ) and Elton Chigumbura to guide the side out of troubled waters.

Taibu was one run away from his second half-century in the series while Tinashe Panyangara, who missed the Chittagong Test due to injury, was batting on 14 when stumps were drawn.

The 18-year-old Enamul, who ended up with 4-74 from 27 overs after an exciting first spell of 19-3-67-4, made the all-important breakthrough in his very first over just before lunch when he bowled Barney Rogers ending a solid stand with Stuart Matsikenyeri.

The pair put on 65 runs for the first wicket.

The left-handed Rogers was on 29 when he mistimed a sweep off the bowler's last delivery of the 19th over and the ball hit the stumps off his pad.

From 87-1 at the interval, the Zimbabweans tumbled to 111-4 shortly after lunch as Enamul got rid of Matsikenyeri, who had just reached his fifty with his eighth boundary in 95 balls, playing a delivery onto the stumps.

Dion Ebrahim's return after serving a one-Test ban was brief.

The experienced Zimbabwe batsman, having settled for a characteristically slow 12 in 64 balls, decided to let a delivery go but it nipped back and struck him on the backfoot.

Next to depart was Brendan Taylor beaten by a ball that straightened after pitching on leg and middle and was trapped plumb also on the backfoot.

However, Masakadza was unfazed by the team's sudden loss of wickets and continued to excel with the willow. The tall number four struck the ball around the park during a 60-run stand for the fifth wicket with his captain Taibu.

But Tapash Baisya, who was hit for three boundaries in a single over by Masakadza, had the last laugh when the paceman broke through just four overs before tea when the batsman misread a slower and drove straight to Aftab Ahmed at mid-off.

Masakadza's strokeful 43 off 70 balls featured six sweet boundaries.

It was Tapash that also ended the 50-run sixth-wicket partnership between Taibu and Chigumbura when the latter (34 off 76 balls) was caught by Ashraful at point while trying to cut the ball.

Apart from being dropped by wicketkeeper Khaled Mashud with Zimbabwe on 178-5 at tea, Taibu, who hit five boundaries in his 166-ball essay, was lucky to survive two close calls -- an lbw shout and a caught-behind appeal by left-arm spinner Mohammad Rafique.

The country's top wicket-taker in both Tests and one-dayers did not pick up a scalp in a marathon 32-over spell that cost 48 runs.