Law enforcement officers are investigating a motorcycle gang called the Invaders in connection with the 2007 deaths of two St. Louis-area men and the disappearance of the third.

The St. Louis Post-Dispatch reported Sunday that court documents showed that for more than a year investigators have suspected members of the gang of killing 39-year-old Randy Greenman, and 36-year-old George Whitter.

The two vanished in September 2007 and their mutilated bodies were found weeks later dumped in two locations in Missouri and Illinois.

A motive for the killings is unknown and the two men were not believed to be gang members.

The newspaper also disclosed a Drug Enforcement Administration affidavit accusing two Invaders of the 2007 presumed murder of a 61-year-old gang member, possibly for cooperating with authorities.