The NYPD has beefed up its presence around the city after the London attack — but “that is not a cause for alarm,” Mayor de Blasio said Sunday.

“New Yorkers today will see a heavier presence at key locations in the city. You’ll see a stronger police presence — including our counter-terrorism forces, which are heavily armed and heavily geared. I want to assure all New Yorkers that is not a cause for alarm, that is a cause for comfort — to see the NYPD out in strength to protect us against any situation,” the mayor said at a press conference.

Hizzoner also offered a message of solidarity to his counterpart in London, Mayor Sadiq Khan, as Khan deals with the aftermath of the three terrorists’ rampage that left seven dead and dozens injured.

“We stand in solidarity with the people of London, we stand in solidarity with my colleague, Mayor Sadiq Khan. Our hearts go out to the people of London, our prayers are with the families of those lost and those injured,” de Blasio said.

President Trump slammed Khan earlier Sunday for telling Londoners that “there’s no reason to be alarmed” after the terror attack.

“At least 7 dead and 48 wounded in terror attack and Mayor of London says there is “no reason to be alarmed!” he tweeted, following another missive criticizing political correctness.