The Secret Service is officially investigating Al Baldasaro, an adviser to the Donald Trump campaign for veterans issues, who called for Hillary Clinton’s execution for “treason.”

“The U.S. Secret Service is aware of this matter and will conduct the appropriate investigation,” spokesman Robert Hoback told The Daily Beast on Wednesday afternoon.

“Anyone that commits treason should be shot,” Baldasaro told The Daily Beast earlier in the day. “I believe Hillary Clinton committed treason. She put people in danger. When people take confidential material off a server, you’re sharing information with the enemy. That’s treason.”

Baldasaro was expanding on a comment he made on Tuesday, when he called for Clinton to be “put in the firing line” over her mishandling of classified emails.

The Trump campaign did not immediately respond to a request for comment.

—Asawin Suebsaeng