ESCONDIDO (CNS) - A 21-year-old man was in custody Saturday in connection with a sexual assault on two women who were bound together and groped in an Escondido home.

Joshua Nitkin was arrested about 5 p.m. Friday on suspicion of kidnapping, false imprisonment and assault with a deadly weapon, San Diego Sheriff's Lt. James Bolwerk said.

The suspect was selling cleaning solution on Felicita Road near Monticello Drive about noon on Thursday when he knocked on the victims' door and offered a demonstration, Bolwerk said.

When a 19-year-old woman allowed him inside, he flashed a knife and threatened to kill her and her 22-year-old sister. He bound both women and molested them before fleeing on foot, Bolwerk said.

The victims freed themselves and called for help. Detectives with the sheriff's Sexual Assault Unit gave a description of  the suspect to patrol deputies, who found Nitkin and detained him, Bolwerk

According to jail records, Nitkin is scheduled to be arraigned Wednesday at 1:30 p.m. in Vista Superior Court. He is being held without bail