SAN ANTONIO (AP) — A 23-year-old man has been arrested after he posted on the Bexar (bayr) County Sheriff's Office Facebook page that he intended to open fire on someone's house.

Sheriff's spokesman James Keith told the San Antonio Express-News (http://bit.ly/1M2y0EL ) that Adrian San Martin even identified the person he was threatening.

Investigators used San Martin's own Facebook page to identify him and determine he was wanted on a warrant for evading arrest. He's being held at the Bexar County jail.

Keith says the threat was lodged in response to a sheriff's post about the arrest of a man suspected of shooting at a deputy.

He says San Martin's post was the most blatant threat ever made on the sheriff's social media sites.

A message left for the attorney representing San Martin was not immediately returned.