Government officials have denounced the first blast as a terror attack at a church in Tanta - before second blast 125km away causing Palm Sunday havoc.
Egypt has been rocked by two bomb blasts in churches in different areas of the country as worshippers celebrate Palm Sunday.
Around 30 worshippers are thought to have been killed and over 60 injured after a bomb exploded inside a church in Tanta during a televised Palm Sunday service .
Then hours later a suicide bomber was said to have targeted a Coptic church in the northern city of Alexandria.
Eyewitnesses describe the scene as chaotic with people crying in the streets and ambulances rushing to the area - which has been closed off by police.
Reports say 11 people have died - including a policeman who was believed to have tackled the bomber - at the Church of St Mark in the city, and 66 people have been injured.
Egyptian State Television reported that the explosion in front of the church in Alexandria was a suicide bombing.
Local reports say Egyptian security is working to dismantle a second bomb in the vicinity of St Mark's Church.
In Tanta - 125km from Alexandria - security officials said the blast was caused by an explosive device under a seat at St George Church, a large Christian place of worship in Tanta - the country's fifth largest city.
Officials are now reporting 30 people had been killed while 60 were wounded in what government officials described as a terror attack.
The official death toll has yet to be confirmed.