Major League Baseball plans to investigate former New York Mets general manager Jared Porter for sending unsolicited, inappropriate text messages to a female reporter, a source with knowledge of the situation told Reuters on Tuesday.

Mets owner Steven Cohen said earlier in the day that he fired Porter following an ESPN report on Monday that Porter sent explicit, unsolicited texts and images to the reporter while he was the director of professional scouting for the Chicago Cubs, citing a copy of the text history the publication had obtained.

"We have terminated Jared Porter this morning," Cohen said in a statement on Twitter. "In my initial press conference I spoke about the importance of integrity and I meant it. There should be zero tolerance for this type of behavior."