MAZAR-I-SHARIF, Afghanistan (AFP) - A foreign physiotherapist working for the Red Cross in northern Afghanistan was shot and killed on Monday (Sept 11) by a wheelchair-bound patient, in the latest attack on the international charity.

The woman was shot inside the aid group's orthopaedic centre in the city of Mazar-i-Sharif, the International Committee of the Red Cross spokesman Thomas Glass said.

The victim, whose nationality has not been released, was taken to the Nato military base hospital at Camp Marmal, where she died from her wounds.

Two people have been arrested over the deadly attack, including the 21-year-old shooter who police said was a "regular patient".

"He had hidden the pistol in his wheelchair which he used to shoot the victim," police spokesman Shir Jan Durrani said.

It was the latest deadly assault on the Red Cross in northern Afghanistan, where Taleban and Islamic State in Iraq and Syria (ISIS) militants have been terrorising the local population.

Most of the charity's programmes in the volatile north have been on hold since February after six Afghan employees of the ICRC were shot dead when their convoy was ambushed in Jowzjan province.

Two of their colleagues were abducted and only released by their captors last week.

No militant group claimed responsibility for the abduction or killings, but Jowzjan police had blamed local ISIS extremists.

Last December, a Spanish Red Cross employee was abducted when workers from the charity were travelling between Mazar-i-Sharif and the neighbouring Taleban hotbed of Kunduz.

He was released several weeks later.