After bowling out Bhairahawa for 59 runs in 20.2 overs, Birgunj openers needed 13 overs to register their fourth victory in as many matches.
In the other match of the day, Region No 6 Baitadi defeated Region No 1 Biratnagar by four wickets.
Bhairahawa are still the strongest contenders among the remaining teams to reach the final with two wins from three matches while Region No 5 Nepalgunj, Baitadi and Region No 3 Kathmandu have a win each.
At BSAM, Bhairahawa saw a batting debacle after choosing to bat first. The openers added 22 runs in 5 overs, which proved to be the highest partnership of the innings. Once Sushan Bari (9) was bowled out by Gopal Singh, the landslide began.
Other opener Swichan Shah got 26 off 52 balls with two fours. Apart from them, the remaining nine batsmen totaled 14 runs off their bats -- five of them did not score. They got to 59 thanks to 10 extras bowled by the Birgunj bowlers.
For Birgunj, Rahul Pratap Singh and Rajeev Shah each took three wickets while Gopal and Mustakim Miya claimed a wicket each.
Birgunj openers Chakra Prakash Singh and Rahul ensured that no other batsmen would be needed for the victory with an unbeaten partnership of 60 runs. Chakra got 29 off 31 balls with five fours while man-of the-match Rahul scored 28 off 47 balls with three boundaries.
The hero of Baitadi´s four-wicket victory at the IOE Ground was captain Bikram Thalal who scored a half-century as Baitadi chased Biratnagar´s 155/9 in 36.5 overs with four wickets remaining.
Hari Chaulagain scored 23 runs in 31deliveries with a six and two fences for Biratnagar while Birendra Dahal (20), Vikrant Dev (13), Rimesh Regmi (12), Lilan Kharel (10) and Rohit Singh (10) were the other players to score double figures. They got 55 extra runs.
Birendra Bista and Jagdish Chand hauled three wickets apiece for Baitadi.
Skipper Bikram scored an unbeaten 61 off 87 balls with five boundaries. Likewise, Tapendra Saud contributed 36 off 81 with a boundary and Sameer Nagarkoti added 24 runs off 33 balls with two boundaries and a six for Baitadi.
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