Cairo (CNN) -- ISIS has a new residency in Egypt, according to a YouTube message posted Sunday.
In the audio message, the Sinai-based militant group Ansar Beit al-Maqdis, or ABM, allegedly announces its allegiance to ISIS, which calls itself the Islamic State.
The roughly 10-minute clip blames tyrants and their "Jewish agents and their allies" for decades of Muslim suffering. The message also calls ISIS "the emergence of a new dawn."
If verified, this would be a new, dangerous chapter for the deadliest group in Egypt. Since 2012, ABM's attacks have grown more daring and sophisticated. The group has killed hundreds of Egyptian police officers and soldiers. The largest attack was last month in the Sinai Peninsula, killing at least 31 soldiers. Analysts put the group's numbers at from the hundreds to roughly a thousand.
While ABM's attacks, until now, have almost exclusively targeted the Egyptian government, there is growing fear that an association with ISIS could expand the threat to civilian and tourist sites.
Egyptian security forces have been aggressively battling ABM since the overthrow of President Mohamed Morsy in 2013.
Numerous checkpoints dot northern Sinai to prevent the movement of weapons and fighters. The threat to security forces operating in this area is so severe that at times, a shoot-on-sight curfew goes into effect between Arish, the largest city in northern Sinai, and the Rafah border crossing with Gaza, according to security officials. After October's attack, the government authorized a three-month curfew for the northern part of the peninsula.
