Christians came under attack in Egypt Friday when eight to 10 gunmen dressed in military uniform stormed a bus, killing 26 and injuring 25 others.

No group has claimed responsibility for the attack but Coptic Christians in the country have increasingly been targeted by the Islamic State, which called them their “favorite prey” in a video released in February by an ISIS affiliate.

In December, a suicide bomber killed nearly 30 people in a crowded church. Then, in April, twin suicide bombings at Coptic churches in Alexandria and Tanta killed 47 people, injuring more than 100 others. ISIS claimed responsibility for all three attacks.

According to Egyptian state TV, the bus attack took place while the Christians were traveling to St. Samuel Monastery in Minya governorate, south of Cairo, Fox News reports.