State Police are investigating death threats made recently against some leaders of the movement to incorporate the city of St. George.

Trooper 1st Class Jared Sandifer, a State Police spokesman, said Tuesday that detectives are trying to find out who wrote and sent a letter containing the threats. The investigation is ongoing.

“This isn’t the first time that we’ve received threats,” said Lionel Rainey, a spokesman for the proposed city of St. George. “We trust law enforcement to be able to handle it.”

A statement posted Tuesday afternoon on the Facebook page of a group in support of creating St. George said leaders of the movement recently learned about the threats.

“Over the last 24 hours, we have been notified by law enforcement that a credible threat to life has been made concerning multiple St. George leaders and supporters as well as their families,” the statement says. “The law enforcement agencies involved are taking these threats very seriously.

“Threatening the lives of individuals and their families will not be tolerated, and we will assist law enforcement in their pursuit of those responsible. At no point should a disagreement ever result violence or in threatening someone’s life.”

The proposed city of St. George would make up the unincorporated southernmost part of East Baton Rouge Parish. It would include about 80 square miles and be home to 100,000 people.

Follow Ben Wallace on Twitter, @_BenWallace and Andrea Gallo, @aegallo.