Thousands of protesters are expected to descend on the convention site in coming days.

Carrying poster-sized pictures of aborted fetuses, nearly 30 anti-abortion protesters marched around the perimeter of the site of the Democratic National Convention, which begins Monday.

Elsewhere, activists protesting U.S. immigration policies set up 553 white crosses in a church parking lot to commemorate people who have lost their lives crossing the U.S.-Mexico border since the 1994 inception of Operation Gatekeeper, a crackdown that pushed illegal traffic to more remote and treacherous areas.

The National Chicano Moratorium Committee planned a protest Saturday at police headquarters against the Democratic Party. And environmentalists planned to gather at outlet stores in Pasadena to protest what they described as the stores' support for logging redwoods.

Meantime, protesters continued planning for demonstrations outside Staples Center by manufacturing banners, picket signs and large, satiric puppets at their headquarters near MacArthur Park.

A day earlier, a federal judge ruled that police could only enter that building if they have a search warrant or during an emergency. The decision came in response to the American Civil Liberties Union's complaint that the headquarters, named the Convergence Center, has been a target of police harassment.

The order was the latest constraint placed on the Los Angeles Police Department in advance of the convention. The LAPD earlier was ordered to shrink a security zone around the Staples Center to allow demonstrators to be nearer to Democratic delegates who will be meeting inside.

Los Angeles Police Chief Bernard Parks joined activists Saturday to pay tribute to children slain by violence and to call for greater restrictions on guns. Parks and his wife, Bobbi, added a pair of ballet shoes belonging to their 20-year-old granddaughter Lori Gonzalez, who was gunned down outside a fast-food restaurant, to more than 200 pairs of shoes from young victims of gun violence.

"When people say guns don't kill people, they're not being truthful," Parks said. "Guns do kill and they kill at a very high rate."