Singapore authorities have detained three people under the Internal Security Act (ISA) between January and July 2011 for their involvement in terrorism-related activities.

In a statement today, the Singapore Ministry of Home Affairs named the three as terrorist organisation Jemaah Islamiyah (JI) members Jumari Kamdi and Samad Subari, and Abdul Majid s/o Kunji Mohammad of the Moro Islamic Liberation Front (MILF).

The announcement came just a day after the 10th anniversary of the Sept 11 attacks, and as Singapore leaders reiterated the importance of vigilance in tackling the terror threat in the region.

The statement said detention orders under the ISA were issued against Jumari in January, Abdul Majid in June and Samad in July.

Jumari was a member of a JI network in a neighbouring country, where he had relocated to in the 1980s.

He had undergone para-military training organised by the JI, including the handling of weapons and firearms. Jumari was apprehended in November 2010 and subsequently deported to Singapore.

Abdul Majid, who had been residing in Malaysia since the mid-1990s, was a member of the MILF since 1998. He had undergone training in weapons handling and in making improvised explosive devices at the MILF's Camp Abu Bakar in Mindanao, the Philippines.

Over the years, he aided the MILF in procuring funds and weapon components. Abdul Majid was arrested in Malaysia in May 2011 and subsequently deported to

Singapore.

Samad was one of the pioneer members of the Singapore JI network who had undergone terrorist training with Al-Qaeda in Afghanistan in 2001.

Following the security crackdown against the JI network, Samad fled to Indonesia and remained in hiding until his arrest by the Indonesian police in Sumatra in June 2009.

He was subsequently charged and imprisoned for immigration offences. Upon the completion of his prison sentence in June 2011, Samad was deported to Singapore.

The statement also said that the authorities released a JI detainee, Mohamed Khalim Jaffar.

He was released on a suspension direction on Sept 1, 2011. Khalim, a member of the Singapore JI, was first detained under the ISA in January 2002.

- Bernama