Officials say a suicide bomber and gunmen have attacked a company that works with NATO forces in Afghanistan's western Herat province.

The attack Thursday began with a suicide car bombing outside the offices of Monaco-based ES-KO, followed by gunmen storming inside and launching an hours-long gunbattle with Afghan security forces.

NATO said it provided air and ground assistance in response to the attack, which took place near its regional headquarters in the area.

ES-KO's website says the company has provide food services to coalition forces in Afghanistan, and built a runway at Herat's airport near where Thursday's attack took place.

There was no immediate word on any casualties or who was behind the assault.

NATO began transferring security responsibility in Herat's provincial capital to Afghan forces in July.

All international combat troops are set to complete their withdrawal from the country and transfer full security control to their Afghan counterparts by the end of 2014.

In a similar attack Monday, a suicide bomber blew up a car near offices used by the United Nations refugee agency in the southern city Kandahar. Three gunmen then rushed into the area, sparking a gun battle. The Taliban claimed responsibility for the combined attack, which killed five people, including three U.N. employees.