Six people were arrested after allegedly heckling megachurch pastor Joel Osteen during his Sunday sermon.

“Joel Osteen, you’re a liar,'” yelled the first of the six protesters as the Houston-based pastor began his sermon, according to churchgoer Anwar Richardson’s interview with local television station KTRK. Osteen, a popular nondenominational televangelist, draws crowds of about 43,000 for weekly sermons, according to the Hartford Institute for Religion Research.

Lakewood Church spokesman Donald Iloff told KTRK that the suspects were all members of the Church of Wells, a small congregation based in Wells, Texas, a church with a history of controversy. (Texas Monthly published an in-depth look at the church in 2014.)

Iloff was not immediately available for comment to The Washington Post.

“Sitting in Joel Olsteen’s church and it has been interrupted FOUR times by people against him. This is crazy!” tweeted Richardson, as the service was underway on Sunday. Richardson also captured video of the sixth heckler being ejected from the church:

“Crazy scene. Sixth person ejected from Lakewood Church by police and security” pic.twitter.com/SwGTcH66Qs

In a short video accompany’s one of Richardson’s tweets, Osteen thanks his congregation for their patience and continues to speak at the front of his round, stagelike pulpit.

Richardson said that he left the service early, with the Charleston church shooting fresh in his mind. “All I could think of is you don’t know what’s going on, and I just can’t wait to find out, so I’ve gotta get out of there,” he told KTRK.

The six men were later arrested by off-duty officers who were hired by the church to work security, said Victor Senties, a spokesman for the Houston Police Department confirmed to The Washington Post. Although authorities could not confirm the exact affiliation of the protesters, they were “said to be protesting against the church pastor and his teaching,” Senties noted.

Jacob Gardner, 26; Kevin Fessler, 27; Mark DeRouville, 25; Matthew Martinez, 27; Randall Valdez, 28; and Richard Trudeau, 32, were charged with criminal trespassing in Harris County, according to the criminal complaint. Gardner and Trudeau are listed as a church elder and a church deacon, respectively, on the Church of Wells website.

Although nationally and internationally popular, Osteen has long been controversial among those who believe that the pastor teaches the Prosperity Gospel — the idea that God will reward the faithful with earthly riches. Osteen has taken issue with the label, saying that “prosperity to me means good relationships, it’s having health, it’s accomplishing your dreams, it’s having money to pay your bills, it’s being blessed you so you can be a blessing.”

The high-profile church was also targeted by robbers last year, who stole $600,000 in donations out of a church safe.

Beyond their statements on Sunday, the suspects have not yet commented specifically on why they allegedly targeted Osteen’s church. Emailed requests for comment to members of the Church of Wells were not immediately returned.

Lakewood officials told police that the same group of suspects “showed up at the church about a month ago,” but did not interrupt the service. Gardner was arrested in 2014 for allegedly causing a disturbance at a religious event held by several local churches.