At least 23 people were killed and 25 injured when gunmen opened fire on a bus carrying Coptic Christians in central Egypt on Friday, the state media reported.The incident occurred in Minya province, about 220 km south of the capital Cairo, as the bus headed to the St. Samuel Monastery.Ambulances dispatched from the cities of Beni Suef and Minya were transporting victims to local hospitals in Adwa, Minya, Maghagha, according to local news outlet Youm7.There was no immediate claim for the attack, which followed Islamic State-claimed bombings that killed at least 46 people at churches in Tanta and Alexandria last month.