Two people have been confirmed dead after a huge explosion at an Exxon Mobil oil and gas facility on Staten Island, on the outskirts of New York City. Officials in the city, which has been on high alert since the 11 September attack in 2001, have stressed that there is no indication of terrorism. The Federal Bureau of Investigation says it is still too early to determine the precise cause of the explosion which occurred as a barge was offloading fuel at about 1010 local time (1510 GMT). A spokeswoman for Exxon Mobil said the bodies of two barge workers had been found in the water and another worker was being treated in the hospital with serious burns. About 30 other workers at the site of the blast were unhurt.