A spokesperson for Certas Energy, which operates the GULF Lix Toll site at Killin, said they were informed of a “fuel loss” on Friday morning following an “attempted theft which damaged one of our fuel tanks”.
“Equipment was found on site that suggested there was an attempt to steal diesel from the tank,” they added.
The spokesperson said they were “as concerned as everyone else” and that dealing with the impact of the incident was their “priority”.
“We are now investigating to fully understand what happened, are engaging with the police, Sepa, the Health and Safety Executive and other specialists at the site. These investigations are ongoing,” they said.
They were unable to confirm how the fuel entered the river, and if the leak had been contained.