Two workmen suffered electric shocks after a pneumatic drill hit a live wire.
Emergency services were called to the scene at Dock Road South in Bromborough at around 1.40pm on Thursday to reports of a serious incident.
Both men were taken to hospital for assessment on burns sustained. Their injuries are not thought to be life threatening.
Police enforced road closures in place at the junction of Old Courthouse Road/Dock Road South/Thermal Road while enquiries were carried out.
The investigation into the circumstances of this incident will be led by the Health and Safety Executive, supported by the emergency services.