The FBI is conducting a negotiated search of former vice-president Mike Pence’s personal residence in Carmel, Ind., following the discovery of classified documents at the property more than two weeks ago.

Agents will also be searching Pence’s Washington D.C. office shortly, according to news reports.

Jack Smith, a federal lawyer appointed by Attorney General Merrick Garland to investigate former president Donald Trump’s potential mishandling of classified documents as well as allegations of election interference, subpoenaed the former vice-president on Thursday.

Pence and his legal team had originally disclosed finding about a dozen classified documents at his home on January 16. Two days later, Pence’s attorneys notified the National Archives.

"Vice President Pence was unaware of the existence of sensitive or classified documents at his personal residence," Greg Jacob, a representative of Vice-President Pence told the National Archives in a latter obtained by CNN. "Vice President Pence understands the high importance of protecting sensitive and classified information and stands ready and willing to cooperate fully with the National Archives and any appropriate inquiry."

The Presidential Records Act mandates that all presidential and vice-presidential records must be transferred to the National Archives at the end of an administration.

The discovery of classified documents at Pence’s residence comes on the heels of Garland appointing special counsel Robert Hur in mid January to investigate President Joe Biden over his potential misconduct for failing to return classified material to the National Archives.

Joe Biden and his legal team alerted the National Archives to caches of classified documents found at the president’s home in Wilmington, Del., as well as the Penn Biden Center, a Washington D.C.-based think tank.

"The extraordinary circumstances here require the appointment of a special counsel for this matter," Garland said in announcing the appointment of a special counsel on January 12.

"I strongly believe that the normal processes of this department can handle all investigations with integrity … I strongly believe that the normal processes of this department can handle all investigations with integrity. But under the regulations, the extraordinary circumstances here require the appointment of a special counsel for this matter," Garland added.

The Pence camp was working in close cooperation with Justice Department officials prior to the search, according to news reports.