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 and alerted the Justice Department, according to two person familiar with the matter.

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

It came a day after reports that the Justice Department had subpoenaed Mr. Pence in connection with the special counsel’s investigation into former President Donald J. Trump’s efforts to cling to power after he lost the 2020 election, which culminated in his supporters storming the Capitol on Jan. 6, 2021.

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

Glenn Thrush contributed reporting.