Major League Baseball will look into a tweet sent by Rob Drake, an umpire, that mentioned the possible impeachment of President Trump, firearms and the specter of an American civil war, a spokesman said Wednesday.

Drake tweeted Tuesday “I will be buying an AR-15 tomorrow, because if you impeach MY PRESIDENT this way, YOU WILL HAVE ANOTHER CIVAL WAR!!! #MAGA2020” The tweet, which was first reported by ESPN, has since been deleted and the account was deactivated.

Drake apologized for the tweet in a statement issued to ESPN late Thursday, saying “I want to personally apologize to everyone that my words made feel less safe.”