Long Island and New York City police are increasing patrols after a truck in Berlin rammed into a crowded Christmas market on Monday, killing at least 12 people and injuring dozens more.

Both the Nassau and Suffolk police departments said they are taking steps to ensure safety, but they maintained there aren’t any known threats.

Nassau police said it is coordinating with federal and local authorities.

“The Nassau County Police Department is taking all steps necessary to ensure the safety of the public and its officers,” a Nassau County police spokeswoman said.

“The department has intensified patrols in all shopping malls, areas of mass transit, public gatherings and near critical infrastructure,” she said. “Social media outlets will be intensely monitored, and we request the public’s assistance in any way possible to stop threats to public safety.”

Meanwhile, Suffolk police said it plans to keep a sharp eye on potential threats.

“We are monitoring the situation and have been in contact with our law enforcement partners,” a police public information officer said late Monday.

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The NYPD said it has officers patrolling and is prepared to deploy more as needed.

“The NYPD is monitoring the events in Germany and around the world today,” a department statement said. “The department has moved highly trained teams, including the Critical Response Command, to high-profile locations around New York City. In the coming days, we will look to learn more about what occurred to inform the NYPD’s operations, deployments, and training of officers.”