Egypt has condemned in "strongest terms" the terrorist attack that targeted Christians gathering for Easter Sunday in Pakistan's eastern city of Lahore, killing at least 70 people.

An Egyptian foreign ministry spokesman re-affirmed on Monday Egypt's position calling for the unity of the international community in facing this ''obnoxious phenomenon [of terrorism] that represents a threat to international peace and security," calling for firm action against such "criminal organisations" and their extremist and destructive ideas.

The spokesman in a Facebook statement expressed on behalf of the foreign minister his condolences to the families of the victims and his wishes of speedy recovery for the injured, asserting Egypt's solidarity with Pakistan in these "difficult times."

The Lahore bombing, which wounded at least 300 people, took place in a park crowded with families, with women and children among the victims.

A breakaway Pakistani faction of the militant Taliban group, which supports the Islamic State group, has claimed responsibility for the deadly bombing, telling the Associated Press that the attack was meant to target the Christian community and was a response to Pakistan's military operations in the country's tribal regions.