Chief Superintendent Isidro Lapeña, Southern Mindanao police director, said the robbers just casually walked into Danecos cashiers office and demanded the money.
"We are looking deeper into the case and we will work on improving the security on the island," he said.
A Daneco security guard said one of the robbers identified himself as Kumander Roy before they left the companys building in Barangay Babak.
The robbers reportedly fled toward Sitio Limao in nearby Barangay Penaplata where a pumpboat waited for them.
Lapeña said the robbery appeared to be well-planned. Edith Regalado