SAN FRANCISCO (CBS/AP) — Thousands of abortion opponents gathered in San Francisco for an annual demonstration on the anniversary of the Roe v. Wade Supreme Court decision that legalized abortion.

Organizers said the crowd on Saturday looked even larger than last year, when they estimated as many as 35,000 people attended the event.

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Demonstrators packed Justin Herman Plaza in downtown San Francisco before marching along the Embarcadero in a line that stretched for blocks.

A small group of pro-choice advocates held a counter-demonstration across from the plaza.

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San Francisco police spokesman Albie Esparza said additional officers were on hand to monitor the march. As of mid-afternoon there were no reports of disruptions or arrests.

The department does not provide crowd estimates.

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