Iraqi troops attempting to reclaim the city of Fallujah have repelled a four-hour attack by so-called Islamic State in the south of the city.
The attack started at dawn on Tuesday in the Nuaimiya area, according to special forces officers.
The officers said IS militants used tunnels, deployed snipers and sent six explosives-laden cars to hit the troops, but they were destroyed before reaching their targets.
The previous day Iraqi troops captured almost 85% of the ground in the same area when they first entered the city.
Fallujah, which has been under IS control for more than two years, is 40 miles west of Baghdad and is the last major city in western Iraq still under control of the group.
More top news
The letter was signed by the CBI, British Chambers of Commerce, the EEF, the Institute of Directors and the Federation of Small Businesses.
A spokesperson said Rory Stewart's remarks were in line with the British government’s stated position.
The minister's intervention will come a week after Trump decertified the landmark agreement claiming it was not in the US national interest.