Suspected separatist rebels sprayed gunfire on a group of Indian security personnel during an ambush in a remote northeastern state Tuesday, killing 15 of them, police said. The attack occurred while security forces in two vehicles were escorting some road workers in Hukumbari, a village 80 kilometers (50 miles) south of Agartala, the capital of Tripura state, said Nepal Das, superintendent of police in Tripura. At least one rebel was killed in retaliatory fire by members of the Territorial Army, Das said when contacted by phone. Das said one wounded security man was hospitalized.