PARIS — Paris' Olympic torch relay descended into chaos Monday, with protesters scaling the Eiffel Tower, grabbing for the flame and forcing security officials to repeatedly snuff out the torch and transport it by bus past demonstrators yelling "Free Tibet!"

The relentless anti-Chinese demonstrations ignited across the capital with unexpected power and ingenuity, foiling 3,000 police officers deployed on motorcycles, in jogging gear and even in-line skates.

Chinese organizers finally gave up on the relay, canceling the last third of what China had hoped would be a joyous jog by torch-bearing VIPs past some of Paris' most famous landmarks.

Thousands of protesters slowed the relay to a stop-start crawl, with impassioned displays of anger over China's human rights record, its grip on Tibet and support for Sudan despite years of bloodshed in Darfur.

Five times, the Chinese officials in dark glasses and tracksuits who guard the torch extinguished it and retreated to the safety of a bus — the last time emerging only after the vehicle drove within 15 feet of the final stop, a track and field stadium. A torchbearer then ran the final steps inside.

Outside, a few French activists supporting Tibet had a fist-fight with pro-Chinese demonstrators. The French activists spat on them and shouted, "Fascists!"

In San Francisco, where the torch is due to arrive Wednesday, three protesters wearing harnesses and helmets climbed up the Golden Gate Bridge and tied the Tibetan flag and two banners to its cables. The banners read "One World One Dream. Free Tibet" and "Free Tibet."

On Tuesday, China condemned protests as "despicable," blaming them on groups seeking to split Tibet from the country.

The 17.4-mile route in Paris started at the Eiffel Tower, headed down the Champs-Elysees toward City Hall, then crossed the Seine before ending at the Charlety track and field stadium.

Throughout the day, protesters booed trucks emblazoned with the names of Olympic corporate sponsors, chained themselves to railings and hurled water at the flame. Some unfurled banners depicting the Olympic rings as handcuffs from the Eiffel Tower and Notre Dame cathedral. Others waved signs reading "the flame of shame."

The Interior Ministry said police made 18 arrests.

Officers sprayed tear gas to break up a sit-in by about 300 pro-Tibet demonstrators who blocked the route. Police tackled protesters who ran at the torch; at least two activists got within arm's length before they were grabbed by police. Near the Louvre, police blocked a protester who approached the flame with a fire extinguisher.