Two men and a teenager have been arrested on suspicion of attempted theft of cable following an incident in Frant last week.
Police were alerted just after 2am to the A267 at Frant where a man was found inside an exposed manhole.
A police dog unit then tracked the area to nearby Bunny Lane and a further two people were stopped.
All three were subsequently arrested on suspicion of theft and have been released on police bail until 25 May.
They are 16, 23 and 32-year-old men, all from Swanley in Kent.