A Hamas member died of injuries sustained in a clash with the Army of Islam, the group said Wednesday. A Hamas spokesman said the man died in Gaza hospital. Hamas police engaged in a gunbattle with loyalists from the Army of Islam on Sunday after attempts to arrest them turned violent. Hamas cracked down on opposition groups over the weekend after a mysterious car bombing killed five of its members. The Army of Islam accused Hamas of exploiting the bombing to round up its members, in a statement posted on the internet. Hamas sees the heavily armed group as a threat to public stability.