Three prisoners have escaped from Parklea prison in Sydney.

The men who were serving sentences of between three and 30 months, escaped from the minimum security section of the privately run prison last night.

Escaped ... Dion Dugal, Ronny Vinaisi, and Raymond Fletcher.

The Commissioner of Corrective Services, Ron Woodham, ordered an investigation of the escapes, a review of the centre's minimum security wing as well as a review of the classification of every prisoner in that jail's minimum security section.

The inmates - Raymond Vance Fletcher, 25, Dion Dugal, 19, and Ronny Vinaisi, 30 - remain at large.