JERSEY CITY - Police say they have arrested the prime suspect in today's vicious attack in Jersey City.

Authorities say a woman's estranged boyfriend hid in her apartment awaiting her arrival. Police say once the woman and a friend arrived home, the man, identified as Frederico Bruno, launched a brutal attack.

According to police, Frederico Bruno attacked his former girlfriend and her friend stabbing them both. During the struggle, police believe Bruno pushed her out of a third-story window while she was holding their 3-month-old son.

He was tracked down to an apartment complex in Belleville at his brother and sister?s apartment where he was arrested Friday evening.

All three victims remain in critical condition, officials say.

Bruno is facing charges of aggravated assault.