Comment on: “Construction of bound entangled edge states with special ranks” [Phys. Lett. A 359 (2006) 603]

In a Letter by Clarisse [L. Clarisse, Phys. Lett. A 359 (2006) 603–607] the open problem of the existence of (5,5)(5,5) and (6,6)(6,6) PPT edge states has been solved. Here we report the existence of another large class of (5,5)(5,5) entangled edge states with positive partial transposes. We also give a PPT edge state with range dimensions (6,6)(6,6).