The F.B.I. on Friday began searching the Indiana home of former Vice President Mike Pence, after one of his aides found classified documents there last month, according to two people familiar with the matter.

Mr. Pence’s aides agreed to the search after discussions with the Justice Department, according to others familiar with the matter.

It came a day after reports that Mr. Pence had received a subpoena from the special counsel investigating former President Donald J. Trump’s efforts to cling to power after he lost the 2020 election.

A spokesman for Mr. Pence did not immediately respond to a request for comment. The Justice Department also did not immediately respond to a request for comment.

After President Biden disclosed that his aides had discovered classified documents from his time as vice president at his home in Wilmington, Del., and a former think tank office in Washington, Mr. Pence’s aides searched his home out of caution.

They discovered documents with classified markings and notified the Justice Department. The F.B.I. showed up while Mr. Pence was at the March for Life in Washington, Greg Jacob, a former adviser and Mr. Pence’s representative for dealing with records related to the presidency, wrote in a letter to the National Archives.

Glenn Thrush contributed reporting.