At least 91 militants were killed in cleanup operations across Afghanistan in the past 24 hours, the country's defence ministry said on Sunday.Afghan National Security and DefenCe Forces carried out the operations in Herat, Ghazni, Paktika and Helmand provinces of the country's 34 provinces, Xinhua cited a defence ministry statement as saying.At least 22 terrorist were also injured during the operations, said the statement providing daily operations updates.The statement also said 11 army personnel were also killed during the same period.The Afghan security forces has beefed up security operations against militants recently as the Taliban militant group attempts to consolidate its positions ahead of winter in the country.The Taliban has yet to make comments.