FBI agents have taken action against former Rep. Swalwell, surrounding him before seizing his devices. This incident occurred at SFO.

The reason for the FBI's actions is not clear from the available information. Former Rep. Swalwell has not made any public comments about the incident.

Further details about the incident and the FBI's involvement can be found through the source. Former Rep. Swalwell's lack of public comment leaves many questions unanswered.