4 die in attack on Gaza tunnels

The articale I read talks about four palestinianswere killed and another 10 injured after egyption sedurity forces blew up four tunnels under the border with Gaza . The palestinian police blame the egyptian security forces for killing the palestinians by destroying the tunnels while they were working in them. Egyptian security officials have admitted they destroyed four tunnels north of the Rafah border crossing with Gaza . Are no why the Egytians leaves the palestinians use Rafah crossing because they need it to bring food and other vital assistance in to the Gaza.However,Isael and Egypt accuse the palestinians of using the tunnels to smuggle arms into the enclave .Egyptis now building a wall with an underground depth of 30 meters (100feet)and a length of 10 kilometers(6miles ) along the Rafah border.