Suspected separatist rebels fired at a freight train traveling through India's restive northeast in the second such attack in two days, killing two policemen and wounding another who were on board, police said Sunday. The attack Saturday evening was blamed on members of Dima Halam Daoga, a small ethnic rebel group fighting for independence from India, said Bhaskar Mahanta, an inspector-general of state police. It has been active for the past three years. Police said the same group was responsible for another train attack Friday that killed one paramilitary soldier and wounded 15 others. Both attacks took place in Northern Cachar district, about 200 miles south of Assam's state capital, Gauhati. No one claimed responsibility for either attack. A combined army, paramilitary and police team was searching the area for the rebels, Mahanta said.