Lagos, Jan 19, SPA -- Four foreign oil workers being held hostage by Nigerian militants will not be harmed unless the government attempts a rescue, the kidnappers said on Thursday. The militants insisted on demands that two ethnic Ijaw leaders be released for them to consider a temporary suspension of attacks on oil installations, which have cut output from the world's eighth largest oil exporter by 10 percent, according to a report of Reuters. --SPA 13 39 Local Time 10 39 GMT www.spa.gov.sa/319817