X-ray spectra of the four objects (PID 30, 64, 116, 245) whose redshifts were determined using the Fe K features. The Chandra ACIS-I data, obtained in the deep CDFS (4 Ms) and the ECDFS observations, were combined with the XMM-Newton data. The rest-frame 6.4 keV and 7.1 keV which would be observed with those redshifts are indicated by the dotted lines. PID 30, 64, and 245 are heavily obscured sources in the V category while PID 116 is a source in the A category.