singapore singapore say thursday detain singaporean man woman affiliations radical islamist group country tough security law allow detention without trial man 25 year-old abu thalha bin samad member southeast asian islamist group jemaah islamiyah ji educate train ji-linked school region ministry home affairs say statement singapore government work regional government deport back singapore arrest ministry say disclose country duty-bound carry whatever instructions ji leaders include perform arm jihad sacrifice life ji violent cause ministry say woman detain islamic state supporter munavar baig amina begam 38-year-old singaporean housewife originally india second woman singapore detain internal security act isis islamic state iraq syria supporter harbor intention make way conflict zone join isis ministry say statement influence others support isis amina share materials promote terrorism social media ... encourage others fight die martyr add neither two available comment last week singapore ban two popular foreign muslim preachers enter city-state say view breed intolerance risk social harmony concern grow spread militancy significant rise number detentions country security law least 14 radicalize singaporeans put restriction detention order isa since 2015 sharply 11 case 2007 2014 accord data ministry diverse affluent singapore majority ethnic chinese sizeable minority ethnic malay ethnic indian communities numerous foreign workers asia beyond singapore say late last year deport nearly 70 foreigners include five maids suspect radicalism previous two years authorities neighbor indonesia world large muslim population say last year arrest six indonesian suspect link islamic state plot attack singapore singapore detain two 'terrorism-related activities