MIAMI , Florida ( CNN ) -- Florida Law enforcement officials said Monday they had launched an investigation into a tragic boating accident near St. Augustine , Florida , that took the lives of five people and seriously injured seven others . CNN affiliate WJXT shows the scene of the deadly boating accident near Jacksonville , Florida , on Sunday . The Florida Fish and Wildlife Conservation Commission has taken over as the lead agency involved in the investigation . The incident took place on Sunday around 7:15 p.m. , in the intracoastal waterway in St. Johns County , Florida , about 20 miles north of St. Augustine . According to FWC investigators , a 22-foot boat with 12 people on board rammed into the rear and right side of a 25-foot tugboat . `` We are still investigating and have n't come to any conclusions yet , '' said Carol Pratt , spokeswoman for FWC . She said they still do not know who was driving the boat . They also are waiting for victims ' next of kin to be notified before releasing any of their names and ages . The tugboat was at a dock and boat launch under construction on the Intracoastal Waterway in Palm Valley , said Jeremy Robshaw , a spokesman for St. Johns County Fire and Rescue . Robshaw said rescuers could n't initially reach the end of the unfinished dock , but laid plywood sheets on the structure to get to crash victims . No one was onboard the tugboat , which is registered to F & A Enterprises in St. Augustine . The seven injured were taken to Shands Jacksonville Hospital in Jacksonville , Florida . Two patients remain in critical condition , one is considered serious and three are in fair condition . A hospital spokesman did not have information on the seventh victim . FWC told CNN that they hope to release more information on the incident and on their investigation . As in any accident , toxicology studies will be done on the driver of the boat , to determine whether he or she was impaired , spokesman Carol Pratt told CNN .
Fish and Wildlife Conservation Commission takes lead in the investigation . Boat crashed into tugboat , barge and dock under construction . Five people killed ; remaining seven taken to hospital with serious injuries . Rescuers had to use plywood panels to reach the passengers .