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YouTube video featuring most-wanted terrorist leader Santoso spurred the National Police to step up security measures for the public and the corps.

'The police's Criminal Division and Densus 88 counterterrorism squad has coordinated with the related institutions to prepare for actions that could harm public order. We urge all citizens, particularly police officers, to remain vigilant,' National Police spokesperson Insp. Gen. Ronny F. Sompie said in Jakarta on Wednesday.

In the 6-minute video, Santoso called on his followers to keep fighting Densus 88, saying that the squad had slain, assaulted and jailed dozens of jihadists. 'Densus 88 is the real enemy, the real demon ['¦] Do not hesitate in facing the battle against Densus 88,' he said while brandishing a gun.

Ronny confirmed that the man in the video was Santoso alias Abu Wardah, the leader of the East Indonesia Mujahideen, who was responsible for a number of terror attacks in conflict-prone Poso, Central Sulawesi.

Santoso's video threatens the safety of around 400,000 Indonesian police officers, particularly Densus 88 personnel.

In the past few years, terrorist cells in Indonesia have shifted their target from foreign interests to police officers, who they refer to as the 'near enemy'.

In October last year, two Poso police officers were found dead in Tamanjeka, an area near Poso suspected to be the center for training for Santoso's group.

In the same month, a bomb exploded at a traffic police post in Poso, injuring two police officers.

On June 3, Zainul Arifin, an affiliate of Santoso, rode into the Poso Police headquarters on a motorbike and detonated a bomb strapped to his body. He was the sole fatality.

'It is all of the police not only Densus 88 that needs to be on alert,' Ronny said.

Ronny said they were still studying the video to discover the responsible party.

The video, called Risalah Kepada Ummat Islam di Kota Poso (A Message to the Muslim Community in Poso), was uploaded by an account under the name Al-Himmah on Sunday.

The video was inaccessible on Wednesday, a day after several media outlets broke the news to the wider public.

Ronny declined to confirm whether the police had blocked the video.

'It is a part of our strategic partnership to get rid of all things that pose a danger to the public,' he said.

Previously, terrorism expert Noor Huda Ismail of the Institute for International Peace Building called on authorities to block the video as it could inspire many would-be jihadists.

Noor Huda suggested that Santoso made the video in the hope of recruiting new members and rebuilding his network following a series of raids by Densus 88 in May that killed seven suspected terrorists and netted 16 others.

Among the slain suspects was Abu Roban, the West Indonesia Mujahideen leader, who allegedly masterminded a number of robberies around Java to finance terror acts led by Santoso.