An Islamic State (ISIS) militant converted to Christianity after meeting Jesus in dream, according to a Youth With A Mission (YWAM) missionary in the Middle East.

Speaking on The Voice of the Martyrs Radio Network, Gina Fadely, the former director of the organisation's Frontier Missions, said that one of YWAM's workers was introduced to an ISIS fighter who had killed a number of Christians. He even admitted to having enjoyed doing so, until he met Jesus in a dream.

"He [the jihadist] told this YWAM leader that he had begun having dreams of this man in white who came to him and said, 'You are killing my people.' And he started to feel really sick and uneasy about what he was doing," Fadely said.

She added that the militant was given a Bible by a Christian man who was about to be killed, which he took and read. "In another dream, Jesus asked him to follow him and he was now asking to become a follower of Christ and to be discipled," Fadely said. "So who knows, perhaps this man will be like Saul in the Bible, who persecuted Christians and then turned from that persecution of the early church to become the Apostle Paul who led it.

"God can turn it around."

Kevin Sutter, current president of YWAM Frontier Missions, said there was a lesson to be learnt in not assuming that ISIS militants are "out of each of God's grace and out of reach of God's spirit".

He said a colleague in the Middle East told him "he has never seen spiritual hunger among Muslim people like he's seeing now."

"This is unprecedented, this has never happened in history," Sutter added. "He said there are gospel programmes going out in Arabic throughout the region, radio and TV and there is a huge response.

"Many people are now following Jesus but they keep it quiet. They haven't gone public about it. They even have church in their own home, they're watching, they'll serve Communion to one another as they're watching TV."

ISIS are now in control of huge swathes of Iraq and Syria, where they are trying to establish a Caliphate. This week, the Archbishop of Aleppo called for intervention from Western forces to stop the "monstrosities" being perpetrated by the jihadists.

"ISIS, which has already killed thousands in the region, is terrifying the faithful in Aleppo," he wrote in a message to Aid to the Church in Need.

"After [attacks on] Maloula, Mosul, Idleb and Palmyra, what is the West waiting for before it intervenes? What are the great nations waiting for before they put a halt to these monstrosities?"