Patong Police were called to the scene, a worksite operated by Chinnaatch Co Ltd near the intersection of Phra Metta Rd and Ratchphat-anusorn Rd, at 10:40am.
On arriving at the scene, officers discovered three Thai men, ceiling installers, standing outside the construction site.
According to the workers, the altercation involved a group of eight electricians who were subcontracted for electrical work.
Tensions had reportedly been escalating between the two groups, which work in adjacent rooms on the fourth floor of the building.
A verbal argument broke out and quickly turned physical, with machetes being used in the ensuing brawl.
Two electricians sustained injuries and were taken to Patong Hospital by bystanders.
The remaining six electricians fled before police arrived, while the ceiling installers were brought in for questioning at Patong Police Station.
At last report police were working with the contractor to locate the six electricians who fled the scene. The investigation is ongoing.