CONCORD - A Manchester man already facing trial for sexually assaulting young boys was indicted by the November Merrimack County Grand Jury on four charges of aggravated felonious sexual assault of a young girl.

Robert Joubert, 59, who was a youth baseball coach in Manchester, the Seacoast and Maine, is being held without bail on charges of assaulting two boys, ages 9 and 11 when the assaults allegedly began.

He has pleaded innocent to the charges involving the boys, one between 1995 and 1997 and the other between 2001 and 2004.

The new indictments allege aggravated felonious sexual assault charges of a female who was 17 when she was allegedly assaulted in 1999.

The indictments allege that one assault was accomplished through the element of surprise, two because Joubert was in a position of authority and the girl was coerced, and one through physical force.

Joubert was arrested in June on the charges involving the boys and authorities said at the time that the investigation was continuing.

A final pretrial conference on the charges involving the two boys is set for May 16, 2013, and jury selection is scheduled for June 3, 2013.