In a condemnable act of violence, 16 people were killed in a terrorist attack in an elderly home in southern Yemen. The dead also included four Catholic nuns who belonged to an order established by Mother Teresa, who is soon to attain sainthood. Witness accounts reveal that the gunmen entered the charity home set up by Mother Teresa, handcuffed the victims, and shot them in the head. Pope Francis denounced the attack by calling it an "act of senseless and diabolical violence".

The spokeswoman for the Missionaries of Charity in Kolkata, Sunita Kumar that they were "absolutely stunned" by the horrific killings and added that "the Sisters were to come back but they opted to stay on to serve people" in Yemen.

Yemen's civil war has divided the nation into two halves - the northern half that's under the control of the Shiite rebels and the southern region that's managed by Saudi Arabia-backed government.

And the situation has left the country vulnerable for blood-hungry terror groups such as the ISIS and al-Qaeda.