GOP state Senate candidate Julie Killian charged today that a campaign worker for her Democratic rival, Shelley Mayer, posted vile and hateful tweets about cops.

It’s unclear what sparked Alex Acaro’s vitriol, but he took aim at the White Plains and Harrison police departments in profane Twitter tirades that called for cops to “burn in hell” in posts dating back to 2012 and 2013.

He also wrote, “F–k the police.”

Acaro, 23, locked his personal and business Twitter accounts and took down his company website, BlueMediaProject.com, when The Post inquired about the anti-cop rhetoric on Wednesday.

By Thursday, he deleted his Twitter accounts entirely.

Acaro’s business website had listed Mayer as a client and he was a near-constant presence at Mayer’s events and debates, often filming and live tweeting, according to Killian.

His Twitter account boasted a Mayer campaign sign as well as his work as an organizer and public relations specialist.

Mayer’s campaign insisted Acaro was an unpaid volunteer.

“Shelley strongly rejects the rhetoric and views in these tweets,” said Mayer spokesman Doug Forand, “The individual who made these tweets is neither an employee nor donor to the campaign.”

Forand also said the focus on Acaro was “a desperate attempt by Killian to distract” from recent reports that one of her donors had attacked teen survivors of the Parkland shooting and compared Planned Parenthood to Nazis.

Tuesday’s special election between Mayer and Killian could tip the precarious balance of power in the state Senate, which Republicans now control.

Acaro did not respond to requests for comment.

Killian said law enforcement deserves “respect and gratitude, not vile attacks and threats.”

“Shelley Mayer must disassociate her campaign from this top adviser, publicly condemn the horrific vulgarities directed at police, and formally apologize to law enforcement and their families,” she added.