Gunmen opened fire on a bus carrying Coptic Christians south of the Egyptian capital on Friday, killing 24 people and wounding 25, officials said.

Those killed were mostly women and children. No group has so far claimed responsibility for the attack on Sunday.

Many of the dead are women and children who were unable to swim away when the boat sank.

Some Christians in Egypt are upset about a new law, which they say cements their "second-class status."

"It's clear that when you speak about social rights and workers' rights in Egypt you are implicitly denouncing the lack of freedom."