Officers say 34-year-old Igor Koob was arrested for aggravated malicious wounding. He remains in custody at this time.
Igor Koob (Fairfax County Police Department)
Officials say Koob entered a woman's room at the Ritz Carlton on Tyson's Blouvard and assaulted her around 9:30 p.m. A hotel guest heard the commotion and saw a man run out covered in blood.
The guest tackled the man and held him down until officers arrived.
The woman suffered stab wounds and remains hospitalized with life-threatening injuries.