The U.S. Justice Department signaled support for legislation to extend by seven months a ban on illegal copycat versions of fentanyl, the powerful synthetic painkiller that has helped fuel the nation’s opioid epidemic.

The U.S. Justice Department sued Walmart Inc., accusing the world’s largest retailer of fueling the opioid crisis in the United States, ignoring warning signs from the company’s pharmacists and filling thousands of invalid prescriptions.

Biogen Inc. agreed to pay $22 million to resolve U.S. allegations that the company illegally used two charities that help cover Medicare patients’ out-of-pocket drug costs as a means to pay them kickbacks to use the Cambridge, Mass-based drugmaker’s multiple sclerosis medicines.

Purdue Pharma LP pleaded guilty to criminal charges over the handling of the company’s addictive prescription painkiller OxyContin, capping a deal with federal prosecutors to resolve an investigation into the drugmaker’s role in the U.S. opioid crisis.

A settlement valued at $8.34 billion was reached between Purdue Pharmaand the Justice Department, which required the drug company to plead guilty to three felonies related to its marketing and distribution of OxyContin, according to the Wall Street Journal.

Walmart Inc. filed a lawsuit against the federal government, seeking clarity on the roles and legal responsibilities of pharmacists and pharmacies in filling opioid prescriptions.

The U.S. Justice Department charged Teva Pharmaceutical Industries Ltd. with conspiring with competitors to raise prices for generic drugs.

Advanced Care Scripts Inc. will pay $3.5 million to resolve allegations that the Florida-based specialty pharmacy served as a conduit for a Teva Pharmaceutical Industries Ltd. subsidiary to pay kickbacks to Medicare patients, the U.S. Justice Department said.

U.S. prosecutors are pursuing possible penalties of nearly $13 billion to resolve investigations of OxyContin maker Purdue Pharma after uncovering evidence of criminal and civil misconduct stemming from the company’s alleged role in fueling the nation’s opioid crisis, people familiar with the matter said.

Chinese government-linked hackers targeted U.S.-based coronavirus vaccine research developer Moderna Inc. in a bid to steal data, according to a U.S. security official tracking Chinese hacking.