UN Middle East envoy Nickolay Mladenov
UN Middle East envoy Nickolay MladenovReuters

Nickolay Mladenov, the UN’s Middle East envoy, on Monday night condemned the bomb attack on a bus in Jerusalem in which 16 people were wounded.

“I condemn the #terror attack in #Jerusalem today and call on all to avoid escalation, stand against violence and those who glorify it,” Mladenov tweeted.

Prime Minister Binyamin Netanyahu had earlier responded to the terrorist attack by pledging to find those responsible and "settle the score."

"We will find whoever made the bomb, we'll get to [the terrorists] who delivered it, we'll get to the people standing behind [this attack] and we'll settle the score with these terrorists."

"We're in a constant battle against terrorism - terrorism of knives, of shootings, and of missiles. And also of tunnels. Israel made a great achievement in our efforts to find the terror tunnels," said Netanyahu, referring to Monday's announcement of the discovery of a Hamas tunnel leading into Israel.

The Hamas terror organization praised Monday's bombing, calling it "the natural response to Israeli crimes, particularly the field executions it conducts, and the assaults on the Al-Aqsa Mosque."

Islamic Jihad also justified the attack, saying that it "delivered the message that the Intifada would continue."