A Queens woman admitted pushing another woman to her death in front of a subway train in Times Square, prosecutors said in court on Tuesday, but the woman denied that she had confessed.

At her arraignment in Criminal Court in Manhattan, the woman, Melanie Liverpool-Turner, 30, pleaded not guilty to a second-degree murder charge.

The police said Ms. Liverpool-Turner pushed Connie Watton, 49, of Queens, in front of a southbound No. 1 train at the busy Times Square-42nd Street station around 1:20 p.m. on Monday. Prosecutors said in a statement read by Justice Gerald Lebovits of State Supreme Court that two witnesses saw Ms. Liverpool-Turner push Ms. Watton.

“This is a strong case with multiple eyewitnesses, and the defendant has admitted to the crime,” Matthew Thiman, an assistant district attorney, said in court.