Singapore conducts terror attack drill

The city-state, a staunch US ally, has stepped up security on fears it will be a target for attack by regional and international extremist groups.

Around 30 Muslim Singaporeans suspected of JI membership are being held under the Internal Security Act, which allows for detention without trial.

Authorities have blamed JI for a string of attacks including the 2002 bombings on the Indonesian resort island of Bali, which killed 202 people.