Egyptians gather in front of a Coptic church that was bombed on Sunday in Tanta, Egypt, April 9, 2017. [Photo/Agencies]

CAIRO - At least 25 people were killed and 60 others injured in an explosion inside a church in the Egyptian Nile delta city of Tanta on Sunday, the Egyptian Health Ministry said.

An explosive device was planted in front seat of the church, State-run TV quoted a security sources as saying.

Eyewitnesses said the explosion struck the crowd and caused destruction of a wall.

The bombing came while the Copt marks the Palm Sunday. The death toll may increase because wounded people are in critical conditions.

There was no immediate claim of responsibility.

President Abdel Fattah Al-Sisi ordered all military hospitals to receive the wounded of the blast.

Some 26 ambulances have been deployed at the Mar Girgis Coptic Church, about 120 km north of Cairo, Magdy Awad, head of the Ambulance Authority told Xinhua.

The security forces intensified its presence around other churches, the Egyptian Interior Ministry said in a statement.

The prime minister as well as the interior minister have gone to Tanta. An investigation was launched.

Coptic Christians make up about 10 percent of Egypt's population. They have largely coexisted peacefully with the majority-Muslim public for centuries.

At the end of 2016, at least 29 people were killed and 31 wounded in an explosion that targeted the Cathedral of Saint Mark in the Abbasia district in Cairo.