The stabbings occurred in an apartment complex in the 6900 block of 37th Avenue South, the first at approximately 3:30 am, the second at 7:11 am. It is currently unknown if the stabbings are otherwise related. Both victims are being treated at Harborview.
The full story is covered at The Rainier Valley Post.
Added by Wendi at 2:52 pm:
The Seattle Police Department blog has further details.