Nigeria's information ministry says the Islamic State group has overstated the number of attacks and people killed by Boko Haram.

Minister of Information and Culture Alhaji Lai Mohammed said in a statement Tuesday that the figures given in an infographic Saturday were fake and part of a strategy to shore up morale of Boko Haram fighters who he said are dispersed, defeated, hungry and sick.

SITE Intelligence Group said the IS group published an infographic on Twitter saying its West Africa division has launched more than 100 attacks, killing more than 1,000 people between Oct. 14 and Dec. 12.

Boko Haram joined the IS group in March.

Mohammed said more propaganda is expected to coincide with a Dec. 31 deadline to stamp out the extremists, and to impress fellow terrorists.