LOS ANGELES — Three Filipinos caught in a sting operation in the Philippines have been convicted of importing military-grade weapons to the United States in a case that earned international attention last year because of a defense lawyer's contention that an undercover FBI agent spent US taxpayer dollars on prostitutes. After a four-week trial, a federal jury in Los Angeles on Monday convicted Sergio Syjuco, 26, Cesar Ubaldo, 27, and Arjyl Revereza, 26, of conspiring to illegally import the weapons and aiding and abetting their importation to the US. Each of the men could be sentenced to more than 20 years in prison and fined $1 million or more. They are scheduled to be sentenced June 9. In late 2010, Ubaldo began meeting an FBI agent who was posing as a prospective buyer of high-powered weapons for US and Mexican drug cartels, according to evidence presented at trial. Prosecutors said Ubaldo introduced the agent to Syjuco, who supplied the weapons, and Revereza, an officer in the Philippines Bureau of Customs who facilitated the movement of the weapons between the Philippines and the US. The men were indicted after authorities seized weapons at the Port of Long Beach in California in June 2011. The weapons seized included a grenade launcher, a mortar launcher and 12 machine guns. Before the trial began, Syjuco's attorney John Littrell alleged that the undercover FBI agent spent US taxpayer dollars on prostitutes in the Philippines for himself and others during the investigation, and asked that the charges be thrown out because of the misconduct. The motion was denied. Prosecutors acknowledged the agent sought nearly $15,000 in reimbursements for "entertainment" and other expenses. — AP