Where Will The Next Terrorist Attack Be In 2016? After Berlin Truck Attack, NYC, London And Europe Review Security

European nations were once again thrust into states of mourning and fear when terror attacks killed more than a dozen people including a Russian diplomat at an art gallery in Turkey and holiday revelers in Berlin on Monday. The deaths, most of them at a Berlin Christmas market that was hit by a large truck, quickly prompted officials in London, New York City and across Europe to ramp up security and review plans for how to protect public events this holiday season.

Police in London said Tuesday they were looking into whether further security measures were needed to protect its civilians in the next couple of weeks. Police forces in Norway and Denmark also ramped up their presence in public and around big events. France, which has been on high-alert since the 2015 Paris terror attacks, indicated that its large-scale security operations would remain in place.

“The Metropolitan Police has detailed plans for protecting public events over the Christmas and New Year period,” the London Police Department said in a statement provided to Reuters. “As a matter of routine, as a precaution, we review our plans after attacks overseas, and we are doing so at present following the awful incidents in Berlin and Ankara last night."

Across the pond, the New York City Police Department deployed more police to patrol popular areas like the Winter Village in Bryant Park, the Christmas tree at Rockefeller Center and Macy's.

"The Department has moved highly trained teams, including the Critical Response Command, to high profile locations around New York City," the NYPD said in a statement. "In the coming days, we will look to learn more about what occurred to inform the NYPD's operations, deployments, and training of officers."

A tractor trailer with Polish license plates rammed through a popular Berlin Christmas market Monday night, killing 12 and leaving behind a trail of broken tables and scattered cartons. There were nearly 50 more who were injured by the truck when it hit the market.

That attack followed the assassination of Russian Ambassador to Turkey Andrey Karlov in Ankara, Turkey. The ambassador was shot while giving a speech at an art exhibit by an off-duty Turkish police officer. After the shooting the killer reportedly yelled, “Don’t forget Aleppo! Don’t forget Syria!” Officials in Russia and Turkey have called the shooting an act of terror.

Security forces have long been concerned about the potential for terror attacks in European and American cities during the busy holiday season. U.S. officials warned last month that it can be very difficult to protect against large attacks on public events.