The US Embassy in Cairo has mourned those killed in Sunday's attack on the Coptic Orthodox Church of Botroseya Sunday morning. 

We strongly condemn this hateful act of violence, which targeted Egypt’s Christian community. We stand with Egypt in opposing all acts of terrorism as we support a stable, secure, prosperous future for all Egyptians, said a statement issued by the embassy.

At least 25 people were killed and 49 wounded in the terrorist attack which targeted worshippers during Sunday morning mass.

Source: MENA