(CNN)Bombs targeted two Coptic churches in Egypt as the Christian faithful observed Palm Sunday, one of the most important days on the religion's calendar.
A powerful blast rippled through a Palm Sunday service at a Coptic Christian church in the northern Egypian city of Tanta, killing 25 people and wounding 60 others, state TV reported. The explosive device at St. George Coptic church in Tanta was planted under a seat in the church, where it detonated in the main prayer hall, it said.
At least 11 have been killed and 35 others wounded in a suicide bomb attack outside the Saint Mark Coptic Orthodox Cathedral in Alexandria according to two state-news outlets. Egyptian state media also reports that the head of Egypt's Coptic Church Pope Tawadros II was inside the Church when the blast happened.
There were no immediate claims of responsibility.
Palm Sunday is the Sunday before Easter, and marks the start of Holy Week for Christians.
He expressed his grief following the church attack.
"To my dear brother his Holiness Pope Tawadros II, to the Coptic church and to all of the dear country Egypt, I express my deep condolences, I prayed for the dead and the wounded, I am close to the families and to the entire community. God convert the hearts of the people who spread terror, violence and dead, and also the heart of who produces and traffic weapons," the pope said.
The Archbishop of Canterbury, serving the Church of England and the worldwide Anglican Communion, called the attacks "evil" and urged people to pray for the victims.
CNN's Sarah Sirgany and Bijan Hosseini contributed to this report
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