It’s a slithery mystery.
A 5-foot-long snake was discovered in a kitchen sink inside an Upper West Side apartment Wednesday morning — and no one’s sure where it came from, cops said.
Police were called to the apartment when someone at 140 West 87 St. saw the boa constrictor slither up an exterior gate and enter a basement apartment around 8 a.m., according to officials.
The NYPD’s Emergency Service Unit converged on the scene and grabbed the reptile when it slithered to an outside fence before handing it over to the Animal Care Centers of NYC.
Cops said it was unclear who owned the brown-spotted boa constrictor and where it came from.
The freakish find left locals shaken.
“It’s all super unsettling because I have a cat and a little daughter, and it was a boa constrictor apparently,” said resident Alex Noschese, 36, who told The Post the snake was in his landlord’s backyard.
An Animal Care Centers spokesperson said boa constrictors are illegal to own in the Big Apple.
The creature was placed with a foster guardian outside of New York City, the spokespersonsaid.
The discovery came days after a New Yorker crashed a rented U-Haul van when he found a live 3.5-foot white snake under his seat while transporting a couch with his roommate.
The driver picked it up, thinking it was a toy left behind.
“It was warm and heavy. Then it turned its head and looked at me,” Jared, who didn’t want to give his last name, told The Post after smashing into a car in Soho.
“I hate snakes. I freaked out. I took my foot off the brake and crashed into the car in front of us.”
