A Cuban exile organization said its commandos bombed a sugar mill and set afire extensive cane fields in western Cuba early today.

"Our planes dropped incendiary and napalm and high-explosive bombs and more than 5,000 capsules of live phosphorus," said a spokesman for the Insurrectional Revolutionary Recovery Movement.

The Niagra mill on the north coast of Pinar del Rio Province was the plant bombed, the spokesman said. He added that the bombing was one of several operations recently carried out by the movement against Premier Fidel Castro's regime.