Two American advisors were killed Saturday in a shooting incident inside the Afghan interior ministry in Kabul Saturday, AFP quoted a government source as saying.

Two American advisors were killed Saturday in a shooting incident inside the Afghan interior ministry in Kabul Saturday, AFP quoted a government source as saying.

"There was a shooting inside the command and control center of the interior ministry and two Americans have been killed," the source, who spoke on condition of anonymity, said.

According to the agency, “some reports said the shooting was a result of a verbal clash", but details were not immediately clear.

The shooting came as protests across the country continue for the fifth day over the burning of copies of the holy Quran at an American-run military base.

At least three people were killed during the demonstrations, as protesters tried to storm a UN compound in northern Afghanistan.

AFP had quoted earlier today head of the public health department in Kunduz, Sahad Mokhtar, as saying that “the report we have so far from hospitals is three killed, 47 wounded in today's demonstrations."

According to an AFP tally, this raises the death toll from the protests to 28.