VATICAN CITY — Expressing his condolences to victims and their families, Pope Francis called for an end to terrorism following a string of deadly attacks in Berlin and Ankara.

"Pope Francis joins all people of good will who are working so that the homicidal madness of terrorism does not find any more room in our world." Cardinal Pietro Parolin

Similar to an attack with a truck that took place in July in Nice, France, a tractor-trailer veered into the crowded Breitscheidplatz Christmas market in Berlin and plowed through bystanders, killing 12 people and wounding nearly 50.

In a Dec. 20 telegram sent by Cardinal Pietro Parolin, Vatican secretary of state, to Archbishop Heiner Koch of Berlin, the pope prayed for the families of the dead and the wounded, "assuring his closeness in their pain."

"Pope Francis joins all people of good will who are working so that the homicidal madness of terrorism does not find any more room in our world," Cardinal Parolin wrote.

Cardinal Parolin said the pope received news of the attack with "profound emotion" and joined the families of the victims in their mourning and "entrusts the dead to the mercy of God."

Cardinal Reinhard Marx of Munich and Freising, Germany, president of the Commission of the Bishops' Conferences of the European Community, said news of the attack in Berlin had "deeply shocked me" and called on the people of Germany to "hold together and stand united as a society."

"The violence on the Christmas market is the opposite of what visitors were seeking. My compassion goes to the relatives of the dead and injured. For all of them, I will pray," he said Dec. 20.

Police detained an asylum-seeker from Pakistan who was near the attack. However, as of Dec. 20, authorities said they are unsure whether he was the driver of the truck.

The attack in Berlin occurred not long after the assassination of Russia's ambassador to Turkey, Andrey Karlov, by a lone gunman during the opening of an art exhibition in Ankara.

Mevlut Mert Altintas, an off-duty Turkish policeman, shot Karlov several times, shouting "Allahu akbar (God is great). Do not forget Aleppo! Do not forget Syria! Do not forget Aleppo! Do not forget Syria!"

The gunman was later shot and killed by police. Several family members and the gunman's roommate were detained by investigators seeking a possible connection with terrorist groups.

Cardinal Parolin conveyed the pope's condolences to President Vladimir Putin of Russia, saying he was "saddened to learn of the violent attack in Ankara."

"In commending his soul to almighty God, Pope Francis assures you and all the people of the Russian Federation of his prayers and spiritual solidarity at this time," Cardinal Parolin wrote.

The Vatican also told journalists that Archbishop Paul Gallagher, Vatican secretary for relations with states, telephoned the Russian ambassador to the Holy See, Alexander Avdeev, to "express his condolences for the murder of the Russian ambassador to Turkey."