A lawsuit alleging discrimination is being called "not true" by executives managing a Cleveland charter school.

Mary Addi is a former employee at the school from 2006 until 2009 and claims in a lawsuit filed in Cuyahoga County Common Pleas Court that she faced discrimination and retaliation while employed at Horizon Science Academy Denison Middle School.

The school is operated by the Chicago based Concept Schools that operates 17 other charter schools across Ohio and received an F on the latest Ohio School Report Card for student test scores.

In a statement by Concept Schools Vice President Salim Ucan, the school says Addi "was fired for lying and caught working another job when she promised taxpayers she would work full time."

In addition, Ucan said the U.S. Equal Opportunity Commission "reviewed these wild claims and dismissed them five years ago because they simply were not true".

(Read more at ABC 5)