An Iran-linked hacker group has claimed responsibility for a cyberattack on a medical tech company in what appears to be the first significant instance of Iran’s hacking an American company since the start of the war between the countries.

The company, Stryker, which is headquartered in Michigan, produces a range of medical equipment and technology.

Historically, Iran has conducted some of the most infamous “wiper” cyberattacks on national enemies, aiming to simply erase all data on computers’ networks. Victims include Saudi Aramco, Saudi Arabia’s national oil company, in 2012, and the Sands Casino in 2014.