Musa Bukar, chairman of Kukawa local government where Baga is located, claimed that more than 2,000 people were killed in the attacks, but he could not explain how he arrived at that toll.
Bodies of residents killed by the militants litter the bushes in the area, he said.
But the local chief of Baga, Baba Abba Hassan, who is now seeking refuge, rejected that
claim.
He said hundreds of people might have been killed, but not 2,000. The actual toll will be known after a head count of households is completed.
"If reports that the town was largely razed to the ground and that hundreds or even as many as 2,000 civilians were killed are true, this marks a disturbing and bloody escalation of Boko Haram's ongoing onslaught against the civilian population," Amnesty International's Daniel Eyre said.