A day after the attacks in Orlando, the mayor and police commissioner were expressing their condolences for the victims of the shooting and calling for unity. NY1's Courtney Gross filed the following report.

Rainbow flags are draped over City Hall in a show of solidarity with the victims of the shooting in Orlando. The tragic event 1,000 miles away has put the city on alert.

"In the coming days you will see an expanded police presence, many key sites, particularly at sites important to the LGBT community," said Mayor Bill de Blasio.

"We have been briefed continuously and are, in fact, part of that investigation as it relates to any part of that New York nexus," said Police Commissioner William Bratton.

At the same time, both the mayor and his top cop were calling for unity. At an unrelated press conference at City Hall, the mayor said the city would not tolerate divisive rhetoric.

"We reject any efforts to set the Muslim community apart from their fellow Americans," de Blasio said.

His comments came hours after Donald Trump called for more Muslim surveillance in an interview on FOX, citing the old NYPD program that spied on Muslim communities. That program has been disbanded.

"We have great capability intelligence-wise," Trump said. "You know, in New York City, we had a fantastic intelligence group set up. When our new mayor, de Blasio, came in, he wiped it all out. It was the best in the country. He wiped it all out, gone, 100 percent. So now we don't know what's going on.

The police commissioner told us the NYPD would not be stepping up its surveillance of the Muslim community in the wake of the attacks.

"We are certainly not bring additional scrutiny to the Muslim community in this city," Bratton said. "If anything, we will deal with them to deal with fears they may have about concerns about retaliation."

Both Bratton and de Blasio were calling for Congress to act on something else: gun control.

"Maybe out of this incident, as tragic as it is, maybe there may be some meaningful discussion to restore the laws that were lost over the last several years," Bratton siad.

From there, the police commissioner said there is no need for assault weapons in American society.