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The spy chief claimed his network received $10,000 a month from the U.S.

But when he asked the CIA if they were used, he

The CIA has ignored crucial intelligence since 2013 from within ISIS ranks that could have helped prevent its rise, a Syrian rebel spy chief has claimed.

The Free Syrian Army spy boss said he had been sending reports to his CIA contacts for more than two years that included GPS coordinates, ISIS movements, photographs and phone numbers.

His operation - which utilizes 30 operatives placed inside ISIS-controlled cities - was 'trained abroad' and received $10,000 per month from the U.S. government, he claimed.

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The Free Syrian Army spy chief (not pictured) said the CIA has ignored crucial intelligence that may have helped the stem the rise of ISIS. Pictured are FSA rebel soldiers in Idlib, northwestern Syria

He claimed plans were drawn up for an offensive to remove ISIS from Aleppo (pictured) as early as 2014 only for the U.S. to delay it several times. Eventually, Al Nusra Front launched a counterattack that scuppered it

A Free Syrian Army rebel smokes a cigarette during a break in fighting against the government in Damascus

The spy chief, interviewed by Le Monde and named only as 'M', said: 'From the moment [ISIS] had 20 members to when it had 20,000, we have shown everything to the Americans', RT reported.

'When we asked them what they did with this information, they always gave evasive answers, saying it was in the hands of decision-makers.

'My agents also managed to get hold of phone numbers of ISIS officials, serial numbers of satellite equipment and IP addresses. But once again, zero response.'

Among the intelligence details cited were a photograph and GPS coordinates of a secret ISIS training camp in Latakia Province, Syria.

Another document was 2014 a battle plan designed to expel ISIS from Aleppo. However, it revealed the attack was postponed several times by the U.S. before a counter attack from Al Qaeda's Al-Nusra Front scuppered it.

Today, control of Aleppo is torn between government and rebel factions and is the scene of some of the worst civilian casualties of the entire Syrian war.

Years of bombing has also fuelled the migrant crisis currently seen gripping Europe as thousands flee their homes in the city.

Meanwhile, top ISIS commander and feared ethnic Chechen jihadi fighter Omar al-Shishani has died of wounds suffered in a U.S. airstrike in Syria, a senior Iraqi intelligence official and the head of a Syrian activist group said.

ISIS commander and feared ethnic Chechen jihadi fighter Omar al-Shishani (pictured) has died of wounds suffered in a U.S. airstrike in Syria, it has been claimed

Al-Shishani, who was wounded in a U.S. airstrike earlier this month, died on Monday outside the group's main stronghold of Raqqa in Syria, the two told The Associated Press.

There was no immediate confirmation of his death from ISIS but its affiliated Aamaq news agency denied he was killed, saying that 'he was not subjected to any injury'.

The outlet quoted an unnamed 'source' for the denial, without giving further details or evidence that al-Shishani was still alive.

An American spokesman for the U.S.-led coalition battling the Islamic State group in Iraq said the alliance was also confirming the militant commander had died.

The red-bearded ethnic Chechen was one of the most prominent ISIS commanders, who earlier served as the group's military commander for the territory it controls in Syria.