An al-Qaida-inspired militant group in Egypt says it was behind this week's assassination of a senior police officer in Cairo and a pipeline explosion in the volatile Sinai Peninsula.

In two separate statements posted late Thursday, the group says it assassinated Maj. Gen. Mohammed el-Said to punish Egypt's military leaders.

Ansar Beit al-Maqdis, or Champions of Jerusalem, also says it hit the pipeline Monday night south of the Sinai city of el-Arish as part of its war against the "Egyptian regime's economy."

The authenticity of the statements could not be independently verified but they were posted on websites commonly used by militants.

Egypt is facing a wave of bombings and shooting attacks by Islamic militants based in Sinai. The government has blamed the Muslim Brotherhood, saying it orchestrated the attacks.