Grand jury subpoenas were served Tuesday to Minnesota Gov. Tim Walz, Minneapolis Mayor Jacob Frey, Minnesota Attorney General Keith Ellison, St. Paul Mayor Kaohly Her, Ramsey County Attorney John Choi, and Hennepin County attorney Mary Moriarty, according to officials.

The investigation centers around whether they have been obstructing federal law enforcement activities in the state, according to officials.

"It is a subpoena for records and documents, not for me personally," Minnesota Attorney General Keith Ellison said in a statement on Tuesday. "Everything about this is highly irregular, especially the fact that this comes shortly after my office sued the Trump Administration to challenge their illegal actions within Minnesota."

--ABC News' Luke Barr

Chongly Scott Thao, 56, was resting at his house in St. Paul on Sunday when federal agents forcibly entered, ordering him and his daughter-in-law to put their hands up, according to Thao's sister-in-law, Louansee Moua.

The agents pointed their guns at Thao's daughter-in-law and ignored the residents when they offered to produce an ID for Thao, according to Moua, who said Thao is a U.S. citizen of Laotian Hmong descent.

Instead, Moua said, the agents handcuffed Thao and brought him outside in the 10-degree weather, wearing only a pair of shoes, underwear and a blanket belonging to his 5-year-old grandson, who was crying inside.

They took him and drove him around for an hour before dropping him back off, Moua said.

On Monday, Homeland Security said in an online statement that agents were at the house in search of two sex offenders with removal orders from a judge. DHS claimed in their statement that Thao lived at the house with these men.

But Thao's family said this is not true. Moua told ABC News that her brother-in-law has lived there for two years with only his son, daughter-in-law and 5-year-old grandson.

When asked for clarification regarding the family's insistence that the two sex offenders being sought by the DHS agents did not live at that house, DHS sent ABC News a statement containing the names of the men the department said the agents were looking for: Lue Moua and Kongmeng Vang.

Thao's sister-in-law said the family does not know these men and that they do not live there.

-ABC News' Christopher Looft

The Trump administration is appealing a judge's decision that temporarily bars federal immigration agents from arresting lawful protesters and observers documenting immigration enforcement operations in Minnesota.

The Department of Justice filed a notice of appeal to the Eighth Circuit Court of Appeals on Monday.

-ABC News' Armando Garcia

Attorney General Pam Bondi and other top administration officials said that the Justice Department is investigating an apparent disruption that occurred at a church in St. Paul, Minnesota, on Sunday as a potential violation of the Freedom of Access to Clinic Entrances (FACE) Act.

In addition to protecting clinic entrances, the FACE Act also bars interfering with the exercise of religious freedom at a place of religious worship.

The disruptive incident occurred at the Cities Church in St. Paul and was captured by former CNN anchor Don Lemon, who posted it to his YouTube page.

"I just spoke to the Pastor in Minnesota whose church was targeted," Bondi said in a post on social media. "Attacks against law enforcement and the intimidation of Christians are being met with the full force of federal law."

Protesters accused one of the church's pastors of leading the ICE field office in St. Paul and spoke out against ICE tactics during the protest.

St. Paul Police said officers responded to Cities Church following reports of "approximately 30 to 40 protesters who interrupted church services." The protesters had moved outside the church by the time police arrived and officers "continued to monitor the protest," the department said.

Harmeet Dhillon, head of the Justice Department's Civil Rights Division, said in an earlier post, "The @CivilRights is investigating the potential violations of the federal FACE Act by these people desecrating a house of worship and interfering with Christian worshippers."

"A house of worship is not a public forum for your protest! It is a space protected from exactly such acts by federal criminal and civil laws! Nor does the First Amendment protect your pseudo journalism of disrupting a prayer service. You are on notice!" Dhillon said in another social media post in an apparent reference to Lemon.

White House press secretary Karoline Leavitt posted as well, stating, "President Trump will not tolerate the intimidation and harassment of Christians in their sacred places of worship. The Department of Justice has launched a full investigation into the despicable incident that took place earlier today at a church in Minnesota."

U.S. Immigration and Customs Enforcement put the blame on Minnesota Gov. Tim Walz and Minneapolis Mayor Jacob Frey, saying on social media that they "are responsible for whipping these mobs into a frenzy and then allowing them to run rampant."

On Monday, a spokesperson for Walz said in a statement that the governor "has repeatedly and unequivocally urged protesters to do so peacefully. While people have a right to speak out, he in no way supports interrupting a place of worship."

Walz said in an address last week, "We can, we must, protest loudly, forcefully, but also peacefully." Frey, last week, also encouraged protesters to remain peaceful, stating, "We cannot counter Donald Trump's chaos with our own brand of chaos."

-ABC News' Jack Date