NEW : Video obtained by KTVU shows a ball of fire erupting in front of the embassy . Video shows a person throwing what appears to be bags of gasoline , embassy officials say . The FBI is investigating an arson fire at the Chinese consulate in San Francisco , an incident that has China 's diplomats calling on the United States Thursday to `` take all measures to provide adequate protection . '' No injuries have been reported . ` ` We strongly condemn this despicable attack , '' Wang Chuan , the consulate spokesman , said .
NEW : Video obtained by KTVU shows a ball of fire erupting in front of the embassy . Video shows a person throwing what appears to be bags of gasoline , embassy officials say . No injuries have been reported . ` ` We strongly condemn this despicable attack , '' Wang Chuan , the consulate spokesman , said .