Though the official number of protesters was not immediately available, organizers billed the effort as the largest-ever rally against the health-care provider. Monica Miller, the director of Citizens for a Pro-Life Society, one of the participating groups, told USA Today that previous protests have drawn thousands of protesters, but hundreds of simultaneous protests have never taken place on the same day.

Thousands of antiabortion activists descended upon Planned Parenthood clinics on Saturday to participate in a nationwide protest aimed at cutting off federal funding for the controversial health-care organization.

The demonstrations unfolded at about 320 clinics around the nation, according to organizers, with some gatherings drawing a few dozen protesters and others drawing hundreds and perhaps thousands more.

The protests kicked off at 9 a.m. Saturday and included speakers, prayer groups and chants, as well as signs distributed by organizers that said “Planned Parenthood sells baby parts.”

The protests come after an antiabortion group secretly filmed a series of videos that show Planned Parenthood staffers discussing the extraction of fetal tissue from aborted fetuses before it is sent to research facilities.

Read More with photos and tweets from a number of the protests.

Read this assessment  from one of the participants in St. Paul, Minn.: Reflections on a Planned Parenthood Protest