Former FBI Director James Comey has been subpoenaed by federal prosecutors in Miami as part of an ongoing Justice Department investigation into Obama-era intelligence officials.

The subpoena is connected to what sources describe as a conspiracy case involving former officials who participated in investigations related to Donald Trump during his presidency and the 2016 election period.

Comey led the FBI from 2013 until his dismissal by President Trump in May 2017. During his tenure, he oversaw high-profile investigations including the probe into Hillary Clinton's private email server and the initial stages of the investigation into Russian interference in the 2016 election.

The Miami-based investigation appears to be examining the conduct of intelligence and law enforcement officials from the previous administration, though specific details about the scope and targets of the probe have not been publicly disclosed by the Justice Department.

Comey has not publicly commented on the subpoena. The Justice Department has declined to provide additional information about the ongoing investigation.