A man slammed his SUV into the Planned Parenthood clinic on Ford Parkway in St. Paul early Thursday morning. Police say the man was an anti-abortion activist and was praying when they found him. Thursday was the 36th anniversary of Roe v. Wade, the landmark decision that found a right to privacy regarding abortion and therefore made abortion legal.

“It’s never happened before and we don’t expect it to happen again,” Sarah Stoesz, president of Planned Parenthood of Minnesota, North Dakota, South Dakota, told the Star Tribune. “We certainly don’t expect this sort of thing.”

Anti-abortion activists mark the anniversary of Roe v. Wade with marches and protests each year. This year, a march was planned for Thursday at the Minnesota State Capitol.

The clinic only suffered minor damage. Police say the man was an anti-abortion protester.

“That’s our belief — that it was an intentional act,” police spokesman Peter Panos told the Associated Press (AP). “Usually we have some demonstrations there on this day, but someone doing actual damage is very, very rare.”

“We think it’s intentional because of Roe vs. Wade,” Panos said. “He’s not saying much. He was praying or chanting when the officers arrived.”

Stoesz told the Star Tribune that very little of the clinic’s activities involve abortion. “The irony is that if those protesters, like this man, would help us assure all people have access to reproductive health care, it would reduce the need for abortions,” she said.