German Chancellor Angela Merkel has appealed to Muslims in Egypt to show solidarity with their Christian compatriots.

A spokesman for Chancellor Angela Merkel condemned the suicide bombings that killed 45 people on Sunday.

Steffen Seibert told reporters that it was important to preserve the peaceful coexistence of Muslims and Coptic Christians in Egypt.

Speaking on Monday in Berlin, Seibert said "the Coptic minority doesn't just need the protection of security forces, but also the solidarity and goodwill of the Muslim majority."