A hydro worker has been killed in southwestern Ontario while working on a power line damaged by superstorm Sandy.

The Ontario Labour Ministry says the worker was electrocuted while tending to a downed power line in Sarnia.

The ministry is investigating the incident, which occurred around 11 a.m. Wednesday morning.

The worker's name has not been released.

Provincial Energy Minister Chris Bentley tweeted his condolences to the worker's family.

It's the second known death from Sandy after a Toronto woman was killed by a fallen sign on Monday.