Updated 5:13 p.m.
Federal officials said Thursday a fire at the Chinese Consulate in San Francisco was ignited at the front of the building, leading to an arson investigation and calls from the Chinese government for better protection of diplomats in the U.S.
The blaze on Wednesday night was not being investigated as an act of terrorism, the FBI said.
"An incendiary device fueled by gas was detonated at the consulate," David Johnson, FBI special agent in charge of the San Francisco division, said at a news conference.
Johnson did not provide any specifics about a possible motive or suspects.
No one was hurt in the fire that charred a doorway, damaged the lobby and burned upward toward the roof.
No bomb-making materials were found, FBI spokesman Peter Lee said earlier.
The building was open for business on Thursday with an increased police presence.
Consulate workers say surveillance footage showed a person coming out of a van parked outside the compound with two buckets of gasoline, pouring it on the front of the building, and setting it on fire, said Wang Chuan, a spokesman for the consulate.
"We strongly condemn this despicable act and have already made representations with the U.S. on the attack," Wang said. "And we hope that the U.S. takes all necessary measures to provide adequate protection to the consular personnel and properties and bring the culprits to justice as soon as possible."
The consulate also would not speculate on who might be responsible for the attack, Wang said. The cost of repairs was not yet known.
Lee said he did not know whether the consulate had received any threats or been the target of demonstrations.
U.S. State Department spokeswoman Marie Harf said it was too early to judge whether security at the consulate had been adequate.
"We take this incident very seriously, and the Bureau of Diplomatic Security is working with the FBI and local authorities to investigate and apprehend the perpetrators," Harf said.
Police and firefighters arrived at the fire around 9:30 p.m. Wednesday and the flames were under control within minutes, fire department spokeswoman Mindy Talmadge said.
The fire caused serious damage and endangered consulate officials and citizens living nearby, Wang said.
The consulate was struck by blaze in March 2008, when a group of people poured flammable liquid on a security gate at the rear of the building and set it on fire. No injuries were reported.
That fire came on the day San Francisco supervisors heard public comment on China's human rights record months prior to the start of the 2008 Summer Olympics in Beijing. The issue arose because of the scheduled Olympic torch run through San Francisco.
The FBI said the 2008 incident was not related to Wednesday's fire.
California Assembly Speaker John Perez condemned the blaze.
"This kind of shameful attack has no place in California. While we are fortunate there was no injury or major damage, this attack on one of our diplomatic partners must be condemned," Perez said.
--AP's Terence Chea and Terry Collins
Updated 11:43 a.m.
The FBI says a fire at the Chinese Consulate in San Francisco was ignited in front of the building, leading to an arson investigation and calls from the Chinese government for better protection of diplomats in the U.S.
No one was hurt in the fire Wednesday night that charred the building's doorway, damaged the lobby and burned toward the roof.
FBI spokesman Peter Lee said the blaze was caused by an "incendiary device," but didn't specify what it was. He said no bomb-making materials were found, and there were no traces of an explosion.
A spokesman for the consulate said surveillance video showed a person coming out of a van parked outside the compound with two buckets, pouring the contents on the front of the building and setting it on fire.
A consulate statement said China urged U.S. authorities to launch an immediate investigation.
The Chinese Consulate in San Francisco said Thursday that its compound was damaged in an arson attack and urged American authorities to protect the safety of its diplomats and its premises.
The consulate said in a notice on its website that a person came out of a van parked outside the compound Wednesday night with two buckets of gasoline, poured the fuel on the front of the consulate building and set it on fire.
According to the statement:
The arson attack is a violent crime targeted at the Chinese consular institution in the United States, causing severe damage to the consulate facilities and posing a threat to the safety of the consulate staff and the residents living nearby. We strongly condemn this despicable act and have already made representations with the US side on the attack. We urge the US side to take all necessary measures to provide adequate protection for Chinese consular personnel and properties, and bring the culprit(s) to justice as soon as possible.
The consulate's notice did not identify the individual or say how the consulate knew what had caused the fire.
The notice said the fire caused serious damage and that San Francisco's police and fire departments arrived at the scene.
A telephone message left with the San Francisco Police Department wasn't immediately returned.
The notice called the incident "a sabotage of a vile nature" and said China had urged U.S. authorities to launch an immediate investigation. It also said an investigation was underway.