Three Chinese citizens were killed and another two remained missing Thursday in Afghanistan's capital of Kabul, said Chinese Embassy Friday.

The fatal crime occurred in an apartment building in Kabul and was believed to target on Chinese citizens, the embassy said in a statement.

The embassy had urged the Afghan government to take all practical methods necessary to investigate the crime and arrest the criminals, and ensure the safety and security of the Chinese citizens and institutions in Afghanistan.

View of the blood is seen in corridor near the room where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

  A view of the building is seen where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on August 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

The broken window of the room is seen where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

The broken window of the room is seen where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

A view of the building is seen where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on August 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

 The view of the room where three Chinese and an Afghan were killed by unknown armed people in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

The room where three Chinese and an Afghan were killed by unknown armed people is seen in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)
 

The room where three Chinese and an Afghan were killed by unknown armed people is seen in Kabul on Thursday in Kabul, Afghanistan on Aug. 9, 2013. Three Chinese citizens were killed Thursday in Afghanistan's capital of Kabul and another two remained missing, said Chinese Embassy Friday. (Xinhua/Ahmad Massoud)