Indonesia's anti-narcotics chief has declared Indonesia to have the "biggest" illicit drugs market in the world, revealing 72 international drug syndicates were detected last year.

Commissioner General Budi Waseso said the sustained extrajudicial killings of suspected drug offenders in the Philippines had led to an increase in trafficking into Indonesia.

"Indonesia is even the biggest [drugs] market in the world, in my opinion," Commissioner General Waseso said during an interview with the ABC.

"The market that existed in the Philippines is moving to Indonesia, the impact of [Philippines] President [Rodrigo] Duterte's actions is an exodus to Indonesia, including the substance."

The anti-drugs chief has softened his previous praise for Mr Duterte's bloody crackdown on drugs.

"I will not follow or copy it, I don't even support it," he said.

More than 7,000 suspected drug offenders have been killed by police or vigilantes in the Philippines since Mr Duterte's war on drugs began after his election win in May last year.

But in the past week, comparisons have been drawn with Indonesia's anti-drugs approach after both the President and the Police Chief ordered police to shoot drug offenders who resist arrest.

"Be firm, especially to foreign drug dealers who enter the country and resist arrest," President Joko Widodo said.

"Shoot them because we indeed are in a narcotics emergency position now."

Anti-narcotics chief calls for increased death penalty

Commissioner General Waseso said he did not know how many offenders had been killed this year, but made no apologies for those who had.

"We think of them as murderers, they are murderers," he said.

He also called for the increased use of the death penalty, although admitted there had been no impact on the drug trade since the executions of the two Australians Myuran Sukumaran and Andrew Chan and others.

"You can't see the impact yet because we still have doubts in implementing it [the death penalty] because of pressure from the outside," he said.

"We've only been serious in dealing with drug-related crime recently."

More than 7,000 suspected drug offenders have been killed since Rodrigo Duterte's war on drugs began. ( AP: Wong Maye-e )

The Commissioner General said corrupt officials made his job harder.

"In our exposure of drug-related money laundering we found indications of involvement of state apparatus," he said.

"We are talking about rogue elements here."

And the anti-drugs boss defended his idea for a prison island for drug offenders, making clear he was not joking when he said it should be guarded by crocodiles.

"Crocodiles are one option, could be piranhas or tigers," he said of the proposal which he has raised directly with the President.

"We can't solve the problem using normal methods."