An explosion went off at a church in the north Egypt on Sunday, killing at least 13 people.
Forty-two more were wounded in the blast which happened in the Egyptian Nile delta city of Tanta, state television reported.
There was no immediate claim of responsibility and the cause of the explosion was not yet known.
According to reports, the blast happened when Coptic Christians were marking Palm Sunday.
Christians constitute around 10 percent of Egypt’s population.
The deadliest attack in years on Christian minority in the country happened in December last year, involving 25 deaths in capital Cairo.