Actress Daryl Hannah has been removed by police from a tree in a Los Angeles community garden, protesting against the site's planned demolition.
Police, some in riot gear, arrested other demonstrators opposed to the plan to build a warehouse on the site.
Hannah last month said supporters had raised $6 million (Ј3.2m) of the $16m (Ј8.5m) needed to save the plot.
Some 350 people have grown flowers and vegetables there since 1992. Folk singer Joan Baez has also campaigned.
The landowner says the gardeners are squatting on land designated for warehouses and factories.
More than 100 police officers arrived at the 14-acre site on Tuesday to enforce an eviction notice.
The BBC's Peter Bowes in Los Angeles said several scuffles broke out and more than a dozen people were arrested.
Other celebrities to have joined the campaign include Willie Nelson, Danny Glover and Laura Dern.
(BBC)
<< Back