Nineteen-year-old twin sisters were stabbed, one fatally, at a Brooklyn bodega on Sunday, reportedly after rejecting a man's advances.

The teens were stabbed around 2:20 a.m. in front of Slope Natural Plus in the Park Slope neighborhood, according to the NYPD.

The attack came after the suspect tried to hit on the teens but was brushed off, relatives told the New York Post.

A bodega worker kicked the man out of the store but when the teens left, he attacked them in the street outside the store, the teens' grandfather said.

"He was waiting for them," grandfather Alphonso Goodson told the paper. "He took it the wrong way. He came after them. That was wrong. That was dead wrong. I hope they catch this guy."

Samyia Spain was stabbed in the chest. Her sister Sanyia was stabbed in the arm.

EMS rushed the teens to New York Presbyterian Brooklyn Methodist Hospital, where Samyia died. Sanyia was listed in stable condition.

The surviving twin says she tried to protect her sister from the man, whom she described as drunk, when he allegedly became enraged that she would not follow him back on Instagram.

"He pushed little Samyia, and then I pushed him," Sanyia told the New York Daily News. "And then everybody else started pushing him out the door.

She says a worker locked the door to keep the man out of the store.

"When we were done waiting for our food, he let us out of the store," Sanyia said. "After he let us out the store, he had locked the door behind us."

That's when the man started stabbing the teens with the knife.

Police are yet to announce an arrest in the case. They were reviewing video from surveliance cameras and say the investigation is continuing.

A memorial was set up outside of Samyia's Brooklyn apartment building on Sunday.