HARRISBURG — Pennsylvania’s top environmental protection official is resigning a week after he was identified as one of eight former employees of the state attorney general’s office who sent or received interoffice e-mails containing pornography.

Gov. Tom Corbett’s office issued a brief statement today on Environmental Protection Secretary Christopher Abruzzo’s resignation.

It gave no reason for Abruzzo’s resignation, other than he made his decision “based on the best interest of the important mission of the Department of Environmental Protection.”

Abruzzo has not commented publicly on the e-mails.

Among the ex-employees identified by Attorney General Kathleen Kane’s office were Abruzzo, state police Commissioner Frank Noonan and two other men serving in Corbett’s administration.

Kane’s office says it discovered hundreds of pornographic e-mails during its review of the Jerry Sandusky child sex abuse prosecution.