OUAGADOUGOU—Burkina Faso’s government, facing mounting public anger over repeated killings by Islamist terrorists, extended its suspension of mobile internet service on Wednesday while offering conflicting reasons for why access was cut in the first place. The authorities cut mobile internet on Saturday, which they later justified by citing a legal provision related to “the quality and security of networks and services and the respect of obligations of national defense and public security.” The suspension came amid protests against the government and allied French forces after 49 military police officers and four civilians were killed on Nov. 14 near the northern town of Inata by suspected jihadists. The internet cut was due to expire on Wednesday evening, but the government ordered it extended for another 96 hours, citing the same legal provision in a statement signed by government spokesperson Ousseni Tamboura. Hours earlier, however, Tamboura provided a different explanation for the …