"We have gathered all evidence from the site. I believe there's not enough (evidence)," chief executive Anon Sirisaengtaksin told Reuters.
His comments come after an Indonesian government source said Indonesia planned to seek at least 20 trillion rupiah ($2.23 billion) from PTTEP as compensation for the spill.
PTTEP is waiting for the results of an Australian investigation into the oil spill at PTTEP's Montara oil field off the Australian coast, Anon said.
