New York Mayor Bill de Blasio has spoken out against claims that ISIS is planning to attack the subway saying there is 'no credible threat.'

After taking the subway to a news conference this afternoon, he said: 'I have a simple message for our New Yorkers: There is no threat to our subway system.'

New York Police Commissioner Bratton said the NYPD has put increased resources toward protecting subways and rail stations and there will be more police patrols on the streets, but insisted the people of the city should feel 'comfortable and secure' using the travel network.

Scroll down for video

New York officials have spoken out against claims that ISIS is planning to attack the subway saying there is 'no credible threat.' Pictured George Venizelos, Assistant Director-in-Charge of the Federal Bureau of Investigation, (left) New York Field Office, New York Police Department Commissioner Bill Bratton (centre) and New York City Mayor Bill de Blasio (right)

Mayor Bill de Blasio said in a news conference this afternoon: 'I have a simple message for our New Yorkers - there is no threat to our subway system'

Enhanced security: More officers including sniffer dogs were deployed to the subway

Reassurances: New York governor Andrew Cuomo reassured commuters the subway was same from a platform

New York City Mayor Bill de Blasio (left) and New York Police Department Commissioner Bill Bratton arrive at the press conference after taking the subway. New York Police Commissioner Bratton said the NYPD has put increased resources toward protecting subways and rail stations and there will be more police patrols

They were responding to claims by the Iraqi Prime Minister this morning that ISIS militants are planning to carry out terror attacks on the New York and Paris subways.

Prime Minister Haider al-Abadi today claimed to have received 'credible' information from intelligence officials in Baghdad that foreign fighters belonging to ISIS were plotting attacks.

National Security Council spokesman Caitlin Hayden said: 'We have not confirmed such a plot, and would have to review any information from our Iraqi partners before making further determinations We take any threat seriously and always work to corroborate information we receive from our partners.'

Mr Abadi made his remarks at a meeting with journalists on the sidelines of a gathering of world leaders at the United Nations General Assembly in New York today.

He said that the suspects included Islamic extremists originally from the United States and France who have been fighting alongside ISIS terrorists in Iraq.

Threat: Iraq's Prime Minister Haider al-Abadi said he was told of the plot by intelligence officials in Baghdad, and that it was the work of extremists originally from the U.S. and France who have been fighting for ISIS

Radicals: ISIS supporters slogans as they carry the group's flags in front of the provincial government headquarters in Mosul, Iraq. Militants in the country are suspected of plotting the New York and Paris attacks

'Today, while I am here, I am receiving accurate reports from Baghdad where there was [the] arrest of [a] few elements and there are networks planning from inside Iraq to have attacks,' he said.

'They plan to have attacks in the metros of Paris and the U.S.,' he added, speaking in English. 'From the details I have received, yes it looks credible.'

'They are not Iraqis. Some of them are French, some of them are Americans. But they are in Iraq,' Mr Abadi went on to say.

His claims were quickly slapped down by U.S. officials, however.

'We've seen the reports of Prime Minister Abadi's comments. We have not confirmed such a plot, and would have to review any information from our Iraqi partners before making further determinations,' said Caitlin Hayden, spokesperson for the U.S. National Security Council.

'We take any threat seriously and always work to corroborate information we receive from our partners. We're obviously very focused on the issue of foreign fighters, as you saw evidenced yesterday at the Security Council session the President chaired, she added.

Force: A handout picture made available by the US Department of Defense today shows a formation of US Navy F-18E Super Hornets refueling having carried out airstrikes on targets linked to ISIS

Allies: Last Friday French President Francois Hollande (left) ordered his country's air force to carry out attacks on ISIS targets in Iraq. In doing so, France joined a 'broad coalition' of nations agreeing to support plans by U.S. president Barack Obama (right) to 'degrade and eventually destroy' the terrorist group

Strikes: A U.S.-led coalition opened airstrikes inside Syria on Monday, expanding weeks of attacks by the United States on Islamic State targets in Iraq

The Iraqi Prime Minister said that he received the information from intelligence officials based in Baghdad earlier this morning.

In addition to the brutality Islamic State has visited on the people of Iraq and Syria, western leaders have voiced concern that the group would turn its terror operations outside the region.

A U.S.-led coalition opened airstrikes inside Syria on Monday, expanding weeks of attacks by the United States on Islamic State targets in Iraq.

A fresh wave of airstrikes from the United States and its Arab allies hit ISIS oil refineries overnight, killing at least 14 militants and striking at the heart of the terror group's funding.

ISIS generates up to $2million a day from the sale of oil, employing highly trained engineers to extract thousands of barrels a day from the vast swaths of Syria and Iraq under the terror group's control.