15 policemen confirmed killed in mortar attack at northern Sinai checkpoint
The death toll from a mortar attack on a checkpoint near northern Sinai's provincial capital of el-Arish has risen to 15 policemen.
Three officers were among those killed, according to Egypt's Interior Ministry.
A Sinai-based Islamic State affiliate claimed responsibility for the attack on Saturday, according to a statement circulated on social media.
The IS affiliate has claimed responsibility for most of the attacks against Egyptian security forces, which have intensified since the military ousted Islamist president Mohammed Morsi in July 2013.
While the attacks have largely taken place in northern Sinai, they have also hit other areas including the capital, Cairo.