St. Louis prosecutors are investigating a possible leak after someone claiming to know about the Michael Brown grand jury proceedings posted information about the case on Twitter.

According to the New York Times, Twitter user @thesusannichols posted Wednesday, "I know someone sitting on the grand jury. There isn't enough at this point to warrant an arrest" in response to another user.

The account was reportedly deleted when other users responded saying that grand jury proceedings are secret. According to the Washington Post, the user had also tweeted messages of support for Darren Wilson.

The grand jury, which was convened in August, has until January to decide whether to bring charges against Wilson in the shooting death of Michael Brown. But prosecutors say they expect a decision by mid-November.

[image via AP]