Singapore calls for vigilance after 'rocket attack' plot foiled

Indonesian anti-terror police carry a bag containing a suspected firearm and other evidence from a building during a raid in Batam, Riau Islands, Indonesia, August 5, 2016 in this photo taken by Antara Foto. Antara Foto/M N Kanwa/via REUTERS

BATAM, Indonesia (Reuters) - Singapore called for heightened vigilance on Saturday, a day after Indonesian police arrested a group of men they believed were plotting a rocket attack on the wealthy city-state with the help of a Syrian-based Islamic State militant.

The six suspected militants were rounded up on Friday in dawn raids on Batam island, about 15 km (10 miles) south of Singapore, where police believe the men planned to fire the rockets from.