SALEM, N.H. —

Stryker, a medical technology company that serves millions worldwide, said it experienced a global network disruption caused by a cyberattack.

A pro-Iran hacking group is claiming responsibility, saying the attack was carried out in retaliation for ongoing airstrikes in the region.

“This is a critical infrastructure type of attack, you know, wipe computers, caused downtime, caused an outage, caused chaos in a critical infrastructure,” said Gary Miliefsky, CEO of Cyber Defense Media Group.

The cyberattack affected people across the country, including a woman in New Hampshire who went in for surgery Wednesday morning.

Ruth Sharpe said she was prepped and ready for her total knee replacement by 8 a.m., but the computer used for the robotic surgery wasn’t working.

“Someone came in and said, ‘Oh, it looks like it was hacked globally. This company all over the world, so we might not be able to do it. We don’t know when,'” Sharpe said.

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After a two-hour delay, Sharpe was able to undergo surgery at Mass General Brigham.

In a statement to News 9, Mass General Brigham said it’s taking precautions to ensure patient care continues without interruption.

“Mass General Brigham is aware of an external issue with global medical device company Stryker, which has impacted some of their systems and global operations. We are actively reviewing the situation and have taken precautionary steps to ensure care continues safely and without interruption until the external issue is resolved,” the health care center said.

Other health centers in New Hampshire, including Elliot Hospital, Dartmouth Health, and Southern New Hampshire Health, said they are aware of the attack but have not been impacted.

Miliefsky said the incident highlights how vulnerable organizations can be to cyber threats and warned people to stay vigilant.

“No matter how much money we put into the cybersecurity, all it takes is one employee to click a link,” he said. “All it takes is one person to be victimized, and it usually has a snowball effect across that corporate infrastructure.”