FBI and IRS agents today conducted an operation at the law office of State Senator Carlos Uresti, News Radio 1200 WOAI reports. The operation took place at Uresti's private law office on Quincy Street, just off I-35 on the north end of downtown.An FBI agent confirmed only that agents are conducting 'lawful law enforcement activity' at the office. They are being assisted by San Antonio Police, officers are keeping bystanders at bay.It is not clear what the agents are looking for. The IRS has not returned a call seeking comment. Developing