CAIRO (AP) — Ansar Beit al-Maqdis, a jihadi organization based in the Sinai Peninsula that has carried out several attacks targeting Egyptian security forces, has pledged allegiance to the Islamic State group.

The announcement reflects the growing regional appeal of the Islamic State, an al-Qaida breakaway group that has carved out a self-styled caliphate in Syria and Iraq and demanded the loyalty of the world’s Muslims.

The announcement pledging loyalty to Islamic State leader Abu Bakr al-Baghdadi came in an audio speech posted late Sunday on the Egyptian militant group’s official Twitter account and a militant website. Last week the group had used the same Twitter account to deny reports saying it had pledged allegiance to al-Baghdadi.

The unknown speaker in the recording released Sunday says Ansar Beit al-Maqdis decided to join the Islamic State group, “whose emergence resembles a new dawn raising the banner of monotheism.”

The speaker said al-Baghdadi was “chosen by God” to establish a new caliphate after “Muslims suffered decades of humiliation.”

“Therefore, we have no alternative but to declare our pledge of allegiance to the caliph… to listen and obey him… and we call on all Muslims to pledge allegiance to him.”

The speaker went on to urge Egyptians to rise up against what he called “the tyrant,” apparently referring to President Abdel-Fattah el-Sissi, who was elected earlier this year after leading the military overthrow of Islamist President Mohammed Morsi in July 2013 amid massive protests demanding his resignation.

Since then Sinai-based militants have carried out scores of attacks mainly targeting soldiers and police, including a coordinated assault last month on an Egyptian army checkpoint that killed 31 troops.

No known group has claimed responsibility for the attack, which prompted the army to declare a state of emergency in parts of northern Sinai, where radical groups have long tapped into local grievances. The attack also led the army to begin demolishing homes along the Sinai border with the Gaza Strip in order to combat smuggling tunnels.

“What are you waiting for, after your honor has been aggressed upon and your sons’ blood has been shed at the hands of this tyrant and his soldiers?” the audio statement said.

In a separate statement posted on its Twitter account, the group said the Egyptian army was bent on emptying the border town of Rafah.

“A whole town is removed from the map and no one stands in the face of this aggression or asks about the fate of its children, women and elderly ones,” the statement said.

It said the plan is to turn the border area into army barracks to “protect their masters, the Jews, from the blows of the mujahideen, and to blockade Gaza.” It went on to refer to el-Sissi by name as a “loyal guard dog” for Israel.

Neither statement referred to the earlier denial that the group had pledged allegiance to al-Baghdadi.

Egypt has long sought to link the radical Sinai group with Morsi’s now-banned Muslim Brotherhood, accusing both of being behind the wave of violence since his ouster.

But the Ansar Beit al-Maqdis statement took a veiled shot at the Brotherhood, saying “peaceful means and infidel democracy are not of any benefit to you.”

The Brotherhood, which publicly renounced violence decades ago and has condemned the recent attacks, won a series of elections following the 2011 uprising that toppled long-ruling autocrat Hosni Mubarak. But the Islamist group later alienated many Egyptians, who accused it of monopolizing power.

Iraqi officials on Sunday said al-Baghdadi was wounded in an Iraqi airstrike in the western Anbar province as he was meeting with militants. Pentagon officials said they had no immediate information about such a strike or on Baghdadi being wounded. There has been virtually no comment on the matter on jihadi websites.