BOSTON — An Illinois-based gas distributor is warning officials in Maine and 11 other states that some propane deliveries may have lacked enough of an odorant needed to alert homeowners of possible leaks.

Aux Sable Liquid Products said in a letter to public safety officials obtained by The Associated Press that the odorant is typically added at the Morris, Ill., facility, but some shipments may have lacked sufficient amounts. A company spokesman confirmed the letter today.

The company said the propane could have been shipped to more than a dozen states including Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Tennessee, Maryland, Virginia and Vermont.

The company said it has ceased shipments from the facility while it investigates.

Massachusetts Attorney General Martha Coakley last week announced an investigation into the delivery of faulty propane, following a fatal construction accident in July.