We reported earlier that 15 people have been killed in an attack on a bus carrying Coptic Christians in southern Egypt.
The local provincial governor now says at least 20 people have been killed and 25 injured.
There are unconfirmed reports that that multiple gunmen were involved.
Initial reports say the dead were on their way to visit an ancient monastery today when their bus came under attack.
There has been no claim of responsibility but the so-called Islamic state has targeted Egypt's Coptic Christians several times in recent months, and vowed to do so again.
Last month it bombed two churches in northern Egypt.
A nationwide state of emergency was declared after those attacks and many Christians here complain that the state has done enough to protect them.