The self-proclaimed 'Caliph' of ISIS has now called on Muslims around the world to conquer Rome and own the world.
The Sunni militant group ran over several regions of Iraq and Syria, declaring an Islamic Caliphate in the occupied region.Reuters

The self-proclaimed 'Caliph' or the leader of the newly declared 'caliphate' in area extending the northern Iraq and parts of Syria, has now called on Muslims around the world to conquer Rome and own the world. He has also urged all Muslims to migrate to the mystic, borderless place they have named as the 'Islamic State'.

Abu Bakr al-Baghdadi, who has a PhD in Islamic studies, said in a newly released statement that Muslims were targeted and killed all around the world and it is the prime responsibility of all of them fight and conquer the world.

He was speaking after the group, previously known as the Islamic State of Iraq and Syria (ISIS), renamed itself as "Islamic State" and installed a new face as the extremist group's leader on Sunday, leaving the United States and the rest of the western world worried about the threat of a rising terrorist group.

"Those who can immigrate to the Islamic State should immigrate, as immigration to the house of Islam is a duty," he said in an audio recording released on a website used by the jihadist group.

"Rush, Oh Muslims to your state! It is your state. Syria is not for Syrians and Iraq is not for Iraqis. The land is for the Muslims, all Muslims. This is my advice to you. If you hold to it you will conquer Rome and own the world, if Allah wills."

The speech, which will clearly be taken as a threat by the Western world, came hours after Iraq's parliament failed to get a new leadership amid divisions between Shia, Sunni and Kurdish Members.

The Sunni Muslim militant group has been raging war across northern Iraq and has captured key border crossings with Syria and Jordan and overrun major cities and towns. The al-Qaeda break-away group, which also has large swath of area in Syria under its stronghold, has been seeking to build the caliphate state.

Baghdadi, who had once spent time in a US detention centre in Iraq, appealed to "judges and those who have military and managerial and service skills, and doctors and engineers in all fields," to fight for the Islamic cause. He also called on jihadi fighters to intensify their fights and violence in the holy month of Ramadan, which began on Sunday.

"In this virtuous month or in any other month, there is no deed better than jihad in the path of Allah, so take advantage of this opportunity and walk the path of your righteous predecessors," Baghdadi said speaking as the leader of a 'Caliphate' – a word many thought had become history with the fall of Ottoman empire about a hundred years ago.