Cops this evening arrested an Occupy Wall Street protester for allegedly threatening to throw Molotov cocktails at Macy’s tomorrow during the group’s city-wide demonstration.

“On the 17th, we going to burn New York City to the f-cking ground,” Nkrumah Tinsley, 29, shouted Tuesday amongst a crowd of his fellow demonstrators, cops said.

WARNING: VIDEO CONTAINS GRAPHIC LANGUAGE

Tinsley was also quoted making a similar quote in today’s Metro newspaper.

“In a few days they’re going to see what a Molotov cocktail can do to Macy’s,” Tinsley also allegedly vowed, according to a video posted on YouTube.

“They got guns! We got bottles!”

Tinsley was arrested around 5 p.m. at Zuccotti Park.

As he was hauled away, Tinsley repeatedly shouted profanities, including “F–k you guys!” at least 10 times.

About 10 of his fellow demonstrators followed him and started jeering at the officers.

“You do not serve and protect us anymore,” said Kanaska Carter,26. “They’re slowing trying to deteriorate the movement, but it’s not going to happen,” she said referring to the NYPD.

Police spokesman Paul Browne said the NYPD became concerned after seeing the video and reading the newspaper article because of the detailed nature of the threats.

“There was specificity as to the date, location and method of firebombing,” Browne said, adding that Tinsley also mentioned attacking the New York Stock Exchange.

“That level of specificity and that level of anger raised concern for both us and the Fire Department.

“This is an individual we are concerned about and we wanted to make sure we apprehended him before tomorrow,” Browne said.

Tinsley was charged with making a terroristic threat. Cops tonight were executing a search warrant at a Bronx home on University Avenue.

It’s not his first run-in with cops since the OWS protests began.

He was arrested on Oct. 26 for allegedly punching a cop who was trying to issue him a summons for disorderly conduct during a protest.

He was charged with assault.