SAN FRANCISCO — Hundreds of protesters took to the streets Thursday over California's new ban on gay marriage, amid deepening political turmoil and legal confusion over who should have the right to wed.

And hundreds more may converge on The Church of Jesus Christ of Latter-day Saints' Temple Square in downtown Salt Lake City tonight, according to event organizer Jacob Whipple.

Whipple said in a press release Thursday that protesters are invited to gather for a rally on State Street and North Temple at 6 p.m. They will march around the two downtown blocks of Temple Square and the Church Office Building to show "solidarity with the protests and marches that have occurred in Los Angeles and San Francisco," the release said.

Legal experts said it is unclear whether an attempt by gay-rights activists to overturn the California prohibition has any chance of success, and whether the 18,000 same-sex marriages performed in the state over the past four months are in any danger.

California voters Tuesday approved a constitutional amendment disallowing gay marriage. The measure, which won 52 percent approval, overrides a California Supreme Court ruling last May that briefly gave same-sex couples the right to wed.

On Thursday, about 1,000 gay-marriage supporters demonstrated outside an LDS temple in the Westwood section of Los Angeles. Sign-waving demonstrators spilled onto Santa Monica Boulevard, bringing afternoon traffic to a halt. The temple was targeted because the LDS Church strongly supported the ban on gay marriage.

"I'm disappointed in the Californians who voted for this," said F. Damion Barela, 43, a Studio City resident who married his husband nearly five months ago. He noted that nearly 70 percent of black voters and a slight majority of Hispanic voters voted for the ban.

"To them I say, 'Shame on you because you should know what this feels like,"' he said.

Some spectators cheered from apartment balconies; one person threw eggs at the marchers. Two people were arrested after a confrontation between the crowd and an occupant of a pickup truck that showed a banner supporting the amendment.

On Wednesday night, police in Los Angeles arrested seven people as more than 1,000 protesters blocked traffic in West Hollywood. One man was wrestled to the ground by police after he jumped up and down on the roof of a squad car. Another man was clubbed by police. Hundreds of protesters also gathered on the steps of San Francisco's City Hall, some holding candles and carrying signs that read, "We all deserve the freedom to marry."

Gay-marriage proponents filed three court challenges Wednesday against the new ban. The lawsuits raise a rare legal argument: that the ballot measure was actually a dramatic revision of the California Constitution rather than a simple amendment. A constitutional revision must first pass the Legislature before going to the voters.