Police arrested Erica Menendez on Saturday after a passer-by on a street noticed she resembled the woman seen in a surveillance video.
A spokeswoman for Queens District Attorney Richard A. Brown says Menendez told authorities she hates Hindus and Muslims.
Subway shoving victim Sunando Sen was from India, but it's unclear if he was Muslim or Hindu.
Sen was killed Thursday. Witnesses say a muttering woman pushed him on the tracks as a train entered a Queens station and then ran off.
Menendez is in custody and can't be reached for comment. It's unclear if she has an attorney.
(Copyright 2012 by The Associated Press. All Rights Reserved.)