Alabama Attorney General Troy King’s office is reportedly under investigation by federal authorities.

Reports published Tuesday said at least six former members of King’s staff went before a federal grand jury meeting in Montgomery last week. They were asked about investigations and their possible connection to allies of the Republican attorney general.

An aide to King, Chris Bence, said news of the investigation is “quite a shock.” But he said the attorney general’s office would be happy to help with the probe.

Although based in Montgomery, the investigation apparently is being headed up by U.S. Attorney Alice Martin of Birmingham.