The number of Australians combatting for the militants groups like ISIS(Islamic State militant group) has reduced, said The Australian border security.

In a report filed by ABC News, Jon Coyne, The Australian Strategic Policy Institute’s head of border security, said that the border security policies are proving effective. The radicalised Australians fighting for the group has plateaued.

He said that with the rising threat of terrorism, radicalization, and international recruit, the border security agencies is all hawk-eyed.

“The Department of Immigration and Border Protection, the Australian Border Force, ASIO, the Australian Federal Police — all of those agencies are going to have to constantly review their strategies. It is to ensure that they’re innovating and changing to meet the new threats as ISIS and as people who want to fight for ISIS change their methods of getting offshore,” said Coyne.

He said that security agencies were successful in monitoring Australia’s northern waters. For a time, it seemed impossible to have a close watch on the ocean all the time.

“When a country has the extensive coastline and waters that we have, it’s impossible for our border agencies to be everywhere and watching every square inch of the ocean all the time,” said Coyne.

On Tuesday, Australian police also detained five men who were suspected of moving off to Indonesia to join the ISIS. They were setting off from the remote peninsula of Cape York in far north Queensland. Musa Cerantonio, born Melbourne; a cheerleader of ISIS, was among the detained, reports Newsweek.

“It was an ill-thought-out measure, but what we’re seeing is one of those new strategies of getting their people offshore,” said Coyne.

Immigration Minister, Peter Dutton, at the 13th National Security Summit, also encouraged everyone to maintain strong vigilance over the criminal networks.

He pledged to introduce strong measures to prop up surveillance at the Australian borders.