SAN FRANCISCO -- An FBI affidavit says a Chinese national arrested in the Chinese Consulate arson in San Francisco claims he was motivated by voices he was hearing.

The affidavit filed in support of federal charges against 39-year-old Yan Feng, of Daly City, says he told investigators he targeted the consulate because voices he had been hearing were in Chinese, so he figured the consulate had to be involved.

FBI Special Agent in Charge David J. Johnson said Monday that Feng was arrested Friday after he called police in Daly City.

The suspect, who has permanent resident status, made his first court appearance Monday and was held on charges of causing damage to property of a foreign government and arson.

Johnson said the investigation is ongoing but the FBI believes it is a criminal matter and that terrorism, politics or civil rights were not involved.

A four-page FBI affidavit filed in support of federal charges said after Feng called Daly City authorities, claiming to be the alleged arsonist, officers detained Feng.

In an interview with FBI agents, Feng said he bought the gasoline at a gas station near the consulate.

He drove to the consulate, then placed two containers filled with gasoline at the consulate's front door.

When his passport failed to burn, the affidavit said Feng used a lighter, igniting the gas before driving away.

Two days after the fire, Feng called the Daly City police dispatcher and identified himself in Chinese as the person who "made the fire" in front of the Chinese government building, according to an FBI translation of the tape.