The NYPD is stepping up its police presence in the city Sunday in the wake of the “horrific” mass shooting in El Paso where a 21-year-old opened fire in a Walmart, killing at least 20 people and injuring dozens more.

The department’s counter-terrorism unit reassured residents Saturday night that there are no specific or credible threats to the Big Apple, but not to be surprised by the extra cops.

Crusius — a supporter of alt-right and President Trump, according to social media accounts — penned a manifesto and posted it online, saying ” this attack is in response to the Hispanic invasion of Texas.”