Palestinian terrorist group claims responsibility for Israel attack , official says . The Israeli military said it was investigating the incident. A rocket is launched from Gaza , but no injuries are reported , Israeli police say . Attack will not deter border fence project , Israel 's prime minister says .
Palestinian terrorist group claims responsibility for Israel attack , official says . Concerns growing about extremist activities in Sinai , officials say . A rocket is launched from Gaza , but no injuries are reported , Israeli police say . Attack will not deter border fence project , Israel 's prime minister says .