Aug 23 (Reuters) - Oilfield services firm Halliburton ( HAL )

said on Friday that an unauthorized third party had

gained access to certain of its systems.

The company said it became aware of the breach two days back

and had launched an internal investigation as well as taken

certain systems offline to protect them.

It said it is still working to identify any effects of the

incident.

On Thursday, the U.S. Department of Energy said the

Halliburton ( HAL ) incident had not impacted any energy services.

Reuters was the first to report about the cyber attack.