Korea Republic settled quicker and were unlucky not to be a couple of goals up after efforts from Lee Han-wool bounced against the bar before Shin Jong-hoon cracked a shot against the post.

The East Asian side took the lead in the sixth minute when Eom Ji-yong dribbled past Nur Yamin Muhammad before smashing home past a stranded Abu Yazid Samah.

Brunei came close to an equaliser in the 10th minute when Nur Yamin's curling attempt was tipped onto the post by Korea Republic custodian Jeong Joo-ho.

Good work by Lee Jun-won with seconds left to play in the first half to win the ball off Amirul Haziq saw Korea Republic double their advantage with Kim Eun-soo sweeping home from close range.

After the interval, Korea Republic continued to dominate but were let down by a combination of poor finishing as well as the woodwork.

Shin rattled the post with a free-kick before Han-wool fired wide with the goalmouth gaping with Kim's powerful left-footed strike hitting both posts before going out.

The third goal eventually came in the 35th minute, Brunei's Amirul Syami Adillah diverting Lee Yong-jun's effort past his own goalkeeper as Korea Republic earned their second win in the group.

After a balanced start to the match, Thailand found the opener in the fourth minute when Itticha Praphaphan intercepted goalkeeper Sayed Mahfoodh's clearance with Muhammad Osamanmusa's pass hitting Ammar Ali to land in goal.

Seconds later, Bahrain had the opportunity to draw level when Thailand custodian Nuttapong Yeemarep fumbled a catch but Salman Muhammad's long range chip went just wide.

A mistake from Mahfoodh in handling a back pass gifted Thailand a free-kick on the edge of the semi-circle that saw Alongkorn Janphon teeing Ronnachai Jungwonsuk to fire home in the eighth minute.

Nuttapong then pulled off a big save to deny Ahmed Antar in a one-on-one situation before Mahfoodh showed good reflexes to stop Krit Aransayalak's attempt.

Thailand increased their lead in the 22nd minute when Mohamed Alsandi's poor pass went straight to Attipong Munphlai, who struck home with precision.

The contest was settled by yet another Bahrain mistake, this time from Ali Alaraibi in the 30th minute which gifted Osamanmusa the easy task of sidefooting home from close range.