GRAND LAKE, Okla. - The investigation into a boat wreck Tuesday at Grand Lake indicates alcohol and speed may have been factors in the crash that killed two, said investigators.
Grand River Dam Authority spokesman Justin Alberty said eight people were on the boat that crashed into a docked houseboat around 5:45 p.m.
University of Arkansas students Rachel Swetnam and William Varner III were killed. They were at the front of the boat when it crashed.
RELATED: 2 killed in Grand Lake boat collision (http://bit.ly/12z86PV)
The boat's other occupants were driver John Deselms, of Tulsa; Taylor Perry, of Springdale, Ark.; Gene DeVerges, of Tulsa; Bryce Banham, of Tulsa; Taylor Reynolds, of Plano, Texas; and Chad Scott, of Perry, Okla.
Deselms and Perry were treated at Craig General Hospital in Vinita, according to the GRDA.
PHOTO GALLERY: Pictures from the scene of the deadly boat crash (http://bit.ly/grandlakephotos)
Alberty says the investigation is ongoing, though "there are indications that alcohol and speed are some of the contributing factors."
Close friends have also suggested the boat was involved in a race and may have been bumped or swerved into the houseboat.
Authorities removed the boat wreckage at 6 p.m. Wednesday night, 24 hours after the crash. Investigators say the scene was very complex to process.
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The complete investigation will be submitted to the Delaware County District Attorney's Office for review.
Alcohol played a major role in fatal boating accidents in 2012, contributing to 17 percent of last year's 651 boating deaths nationwide, according to the U.S Coast Guard.
MORE: Coast Guard's report (http://bit.ly/boatstudy)