Azhar Grand Imam Ahmed el-Tayyeb has warned against what he described as " hell preachers.""Those who plot terrorist acts and bombers and those who support them in all forms will meet their God while their hands are tarnished with blood," Tayyeb said during an interview with the state television on Friday.Tayyeb asserted that suicide bombers are committing dual crime because they "kill themselves and others at the same time."Islam is against committing suicide and killing others, he stressed.