The U.S. International Trade Commission said on Aug. 8 that it will follow up on a complaint filed by Qualcomm Inc. and will launch an investigation into Apple Inc.

Qualcomm has asked the commission to bar Apple from importing iPhone 7 smartphones and tablet computers, alleging that Apple has infringed six patents.

Qualcomm is asking the ITC to bar importation of iPhones and iPads that use cellular baseband processors other than those supplied by Qualcomm’s affiliates.

“Qualcomm is pleased with the ITC’s decision to investigate Apple’s unfair trade practices and the unauthorized importation of products using Qualcomm’s patents,” said Don Rosenberg, the company’s general counsel, in a statement. “We look forward to the ITC’s expeditious investigation of Apple’s ongoing infringement of our intellectual property and the accelerated relief that the commission can provide.”

Qualcomm filed its complaint with the U.S. agency on July 7.

Qualcomm and Apple have been trading accusations of unfair conduct in several courts throughout the world. At stake is more than $1 billion.