Jakarta - A Sumatran tiger entered an office of an oil company in Riau province and has remained there for the last 12 hours, local media reports said Wednesday. 

The tiger, an endangered species in Indonesia, came through the front door and entered an office of PT Bumi Siak oil company in Siak district of Riau province in eastern Sumatra on Tuesday evening, the state-run Antara news agency reported. 

An office employee, who identified himself only as Darman, was about to leave the office on Tuesday evening when the tiger suddenly appeared and went into one of the offices, he said. 

"The tiger is still in the office room but we don't have the courage to approach it," Darman said. 

The Sumatran tiger is believed to be the last remaining sub-species of tiger indigenous to Indonesia. The Bali and Java tigers are believed to be extinct. 

Environmentalists said the destruction of the species' natural habitat by logging and uncontrolled development projects has resulted in Sumatran tigers frequently entering populated areas. 

In addition, rampant poaching for the black market trade in tiger skins and bones has also driven Sumatran tiger numbers to drastically drop and there are only about 400 left in the wild, according to activists. (dpa)