Federal and state law enforcement agents raided the office and home of Gordon D. Fox, the speaker of the Rhode Island House, on Friday, but did not disclose what they were looking for. As news media gathered outside, agents filed out of both locations with boxes and bags. Mr. Fox returned home in the afternoon and said nothing to reporters who were waiting outside. Conducting the searches were agents from the F.B.I., the Internal Revenue Service, the United States attorney’s office and the state police. The surprise searches stunned Providence, sending politicians and reporters scurrying for answers that did not immediately materialize. The information vacuum did not stop some politicians from calling for the speaker’s resignation or others from suggesting they might run for speaker themselves. Mr. Fox, 52, a Democrat, was first elected to the state House of Representatives in 1992 and has been speaker since February 2010. He had planned to run again for his seat this fall and hoped to keep his position as speaker.