Prison guard arrested over alleged sexual assault of inmate

A New South Wales prison guard has been arrested after allegedly sexually assaulting an inmate.

Police received reports that a 36-year-old male correctional officer had allegedly assaulted a 28-year-old female inmate at a correctional facility in Wellington, in the state's west, between June 18 and July 30.

The prison guard was arrested at the correctional facility at 8.40am yesterday.

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The 36-year-old was taken to Wellington Police Station where he was charged with four offences, including three counts of aggravated sexual assault - victim under the authority of offender and engaging in a relationship with an inmate.

He has been refused bail and will appear in Dubbo Local Court today.