Prosecutors on Monday charged 33-year-old Sebastian Zapeta-Calil with first- and second-degree murder and first-degree arson in connection with the death of a woman who died after being set on fire in a New York City subway train a day earlier.

New York City police arrested and charged a man suspected to have set a woman on fire in the subway early Sunday and then watched from a bench as she became engulfed in flames and died.

Sebastian Zapeta-Calil ID'd as illegal migrant accused of setting woman on fire riding NYC subway, hit with murder and arson chargesThe illegal Guatemalan migrant accused of torching a sleeping

The illegal Guatemalan migrant charged with torching a sleeping straphanger to death on a Brooklyn subway train was a heavy drinker who chain-smoked K2, pals at the homeless shelter where he was living told The Post.

Sebastian Zapeta-Calil made a bizarre admission to officers after allegedly setting a woman on fire who died on the spot.