The Palm Sunday church bombings at Coptic churches in Tanta and Alexandria, Egypt, take place.

On Palm Sunday, 9 April 2017, twin suicide bombings took place at St. George's Church in the northern Egyptian city of Tanta on the Nile delta, and Saint Mark's Coptic Orthodox Cathedral, the principal church in Alexandria, seat of the Coptic papacy. At least 43 people were reported killed and 789 injured. The attacks were carried out by a security detachment of ISIS.

Tanta is a city in Egypt. Tanta had a population of 658,798 in 2018, making it the fifth most populous city in Egypt. Tanta is located between Cairo and Alexandria: 94 km (58 mi) north of Cairo and 130 km (81 mi) southeast of Alexandria. The capital of Gharbia Governorate, it is a center for the cotton-ginning industry.

Alexandria is the second largest city in Egypt and the largest city on the Mediterranean coast. It lies at the western edge of the Nile River Delta. Founded in 331 BC by Alexander the Great, Alexandria grew rapidly and became a major centre of Hellenic civilisation, eventually replacing Memphis, in present-day Greater Cairo, as Egypt's capital. Called the "Bride of the Mediterranean" and "Pearl of the Mediterranean Coast" internationally, Alexandria is a popular tourist destination and an important industrial centre due to its natural gas and oil pipelines from Suez.