Undated (AP) _ An anti-abortion rally in Columbus, Ohio, drew at least 10,000 people Saturday, and 89 people were arrested in Pittsburgh at a protest outside an abortion clinic.

One of those arrested was suspected of knocking a police officer to the ground, Lt. Thomas Neill said. The officer was not hurt, he said.

The others were charged with failure to disperse after blocking the entrance to the Allegheny Reproductive Health Center, Neill said.

In Columbus, police estimated at least 10,000 people had gathered for a pre-rally concert at a downtown park, the first in a series of weekend events sponsored by both sides of the abortion debate.

''There is a campaign around the country, with a lot of money, and they're saying that America is changing its opinion on the abortion issue,'' said J.C. Willke, national Right to Life president.

''People think that this is a women's issue, but in actuality it's a human issue,'' he said.

Karrie Kulich, 15, of Orient, Ohio, carried a sign reading ''Stop the Slaughter.''

''My mom was going to abort me because she didn't want me,'' she said. ''But thank God, she put me up for adoption. I'm grateful for that, and that gives me special reason to be here.''

A coalition of abortion-rights organizations planned to sponsor a March for Choice downtown on Sunday.

''We see this as a kickoff to building a pro-choice presence in this state,'' said Jill Spangler, co-chair of the coalition.