"Effective immediately we are deploying body cameras to every officer in the field in Minneapolis. As funding is available, the body camera program will be expanded nationwide," Noem said on X.
The immigration enforcement policies of President Donald Trump's administration have come under scrutiny after the killing of two US citizens in Minnesota last month by agents of the federal Immigration and Customs Enforcement agency, which is part of the Department of Homeland Security.
Tensions in Minneapolis-St Paul ramped up after the January 7 killing of Renee Good, who was shot in her car by a federal immigration agent and the fatal shooting of Alex Pretti by a Border Patrol agent on January 24 further inflamed tensions.
The killings have led to nationwide protests but the Trump administration defended the agents, saying they had acted in self-defence.
But videos of the events cast doubt on those narratives and fuelled calls for the agents to be criminally prosecuted. Federal authorities refused to co-operate with local law enforcement investigations of the killings.
Human rights advocates have widely condemned Trump's immigration policies as lacking due process and making the environment hostile for immigrant communities. Trump has cast his actions as being aimed at improving domestic security.
Trump also commented on Noem's announcement on Monday, telling reporters that body cameras "generally tend to be good for law enforcement, because people can't lie about what's happening".
"So it's, generally speaking, I think 80 per cent, good for law enforcement. But if she wants to do that, I'm okay with it," Trump said, while adding the decision was made by Noem and not by him.
Noem's announcement came after a call she had with US Customs and Border Protection Commissioner Rodney Scott, Trump border czar Tom Homan, who has been tasked to take over operations in Minnesota, and acting ICE director Todd Lyons.
Noem said the Trump administration will "rapidly acquire and deploy body cameras to DHS law enforcement across the country".
