Organized crime prosecutors in Panama have for a second day searched the offices of a law firm at the center of a huge document leak revealed details of offshore financial accounts.

Attorney General Kenia Porcell said Wednesday that it is too early to talk about what investigators may have found at the headquarters of Mossack Fonseca, which set up shell companies and offshore accounts for a wealthy global clientele. She says investigators are looking for any evidence that the firm was used for illegal activity.

The law firm has denied any wrongdoing.

The search began Tuesday afternoon, 10 days after news reports began emerging about the document leak known as the Panama Papers.

About 30 demonstrators gathered outside Mossack Fonseca's office to demand a thorough investigation.