Qualcomm this evening revealed that it is countersuing Apple as the legal battle between the two companies heats up. While it had been previously reported that Qualcomm was considering legal action, the company made it official today in a 134-page filing…

In the filing, Qualcomm firmly denied the allegations made by Apple. The chip maker stated that Apple is trying to use its power to force Qualcomm into lowering royalties for its own sake (via CNET):

Additionally, Qualcomm accused Apple of breach of contract and interfering with agreements and relationships Qualcomm has with other companies. The company also accuses Apple of withholding payments that are part of a previously agreed upon relationship for high-speed technology. Furthermore, Apple is being accused of deliberately making false statements to the government relating to Qualcomm’s business.

While Apple argued in its lawsuit that Qualcomm had caused damages to its business, Qualcomm states in its lawsuit that “to the extent that Apple has suffered damages, if at all, all damages were caused by Apple’s own actions.”

Perhaps most notably, Qualcomm alleges in its lawsuit that Apple knowingly under-clocked the Qualcomm LTE chip in the iPhone 7 to get of rid of discrepancy between models with the Intel chip. Apple also allegedly threatened Qualcomm to prevent it from making public comparisons that unearthed the “superior performance of Qualcomm-powered iPhones.”

Apple originally sued Qualcomm earlier this year for $1 billion over patent royalties. Apple’s lawsuit followed an FTC complaint that alleged Qualcomm engaged in monopolistic practices to prevent Apple from sourcing key components from competitors. For its part, Qualcomm responded and explained that Apple “intentionally mischaracterized our agreements and negotiations.”

Originally, it had been reported that Qualcomm was mulling retaliatory legal action against Apple, but that it hoped the business relationship between the two would go unaffected. Qualcomm, in its legal filing toady, spoke fondly of Apple and its effect on consumer technology:

When asked for comment, Apple referred back to the comment it made in January: