Cairo ( CNN ) At least 12 people were killed Sunday , and more injured , in separate attacks on a police station , a checkpoint and along a highway in Egypt 's northern Sinai , authorities said . Six people , including one civilian , were killed when a car bomb exploded near the police station in Al-Arish , capital of North Sinai , Health Ministry spokesman Hossam Abdel-Ghafar told Ahram Online . He said 40 people were injured . Ansar Beit Al-Maqdis , an ISIS affiliate , claimed responsibility for the attack , which came hours after another operation that the group also claimed . In that earlier attack , a first lieutenant , a sergeant and four conscripts were killed when their armored vehicle was attacked on the highway from Al-Arish to Sheikh Zuweid in northern Sinai , the military said . Two other soldiers were injured and taken to a military hospital . Ansar Beit Al-Maqdis has claimed many attacks against the army and police in Sinai . A third attack Sunday on a checkpoint in Rafah left three security personnel injured , after unknown assailants opened fire at them , according to state media . The attacks come as the military announced a reshuffle of several senior military positions , state media reported . Among those being replaced are the generals in charge of military intelligence and Egypt 's second field army , which is spearheading the battle against the insurgents in the northern Sinai . Egypt 's army has been fighting a decade-long militant Islamist insurgency , which has spiked since the ouster of Muslim Brotherhood president Mohamed Morsy in the summer of 2013 . Hundreds of police and soldiers , as well as civilians , have been killed in militant attacks in the past months . Ian Lee reported from Cairo . Anas Hamdan reported from Atlanta .
Six people , including one civilian , are killed when a car bomb explodes near a police station . Six others are killed when their armored vehicle is attacked on a highway in northern Sinai . Ansar Beit Al-Maqdis , an ISIS affiliate , claims responsibility .