Lancashire are on the brink of defeat on the final day of their County Championship clash with Somerset at Taunton
Spinners Jack Leach and Dom Bess bowled Somerset to the brink of a crucial victory.
Left-armer Leach followed up his five first-innings wickets with four for 79 from 47 overs as the visitors, who began the day on 28 without loss following on, progressed to 247 for eight by stumps - a lead of just 45.
Bess provided good support on a pitch offering only slow turn and had figures of three for 85 from 38 overs at the close. Craig Overton was the other wicket-taker.
There were half-centuries from Haseeb Hameed and Liam Livingstone in a more convincing Lancashire batting effort. But from 144 for one, their score was another disappointment.
The visitors extended their opening partnership to 82 before a short rain break disrupted Alex Davies' concentration. The third ball after the resumption saw him offer a return catch to Leach, aiming through the leg side, having made 49.
It was 89 for one when another shower forced an early lunch. On a pitch offering little assistance to seam or spin, Somerset's bowlers had their work cut out.
Hameed reached a studious 151-ball half-century, with six fours, but on 62 drove Leach to cover where Tom Abell took a straightforward catch.
Steven Croft fell cheaply to Bess, lbw trying to sweep a full toss, and the young off-spinner went on to remove Shiv Chanderpaul for nine, bowling the veteran West Indies star through the gate.
At tea Lancashire were 175 for four and required a further 27 to make Somerset bat again. The final session saw the hosts take the second new ball and Overton broke through with it as Dane Vilas, on 14, feathered a catch behind.
Livingstone went to an excellent fifty, made off 153 balls, with three fours and a six, before falling on 57.
He was given out caught behind off Leach, although wicketkeeper Davies removed the bails and appeared to appeal to the square-leg umpire for a stumping.
Ryan McLaren battled hard for his 15 runs but was then snapped up off bat and pad by Marcus Trescothick at short-leg to give Leach his fourth wicket.
Bess then had Stephen Parry caught at silly mid-off stretching forward for 12 before Ryan Jarvis and Tom Bailey ensured the game went into a fourth day.
Somerset could move out of the First Division relegation zone with victory on Friday.