WOODBURY - Police across the country and on Long Island are on high alert following the ambush in Dallas.

For the next 36 hours in Nassau County, all patrol cars will have two officers instead of one. Bulletproof vests have already been mandatory, and they will also have extra vests and firepower in their vehicles.

“There is a significant increase in patrol rifles, and we will continue to increase the number of patrol rifles,” said acting Nassau Police Commissioner Thomas Krumpter. “Our police officers are provided with tactical vests, tactical ballistic vests. They are class 4A vests that are above what normal soft body armor a police officer would wear.”

In Suffolk for the next 48 hours, there will be two officers in all highway patrol units, as well extra manpower in the specialized units.

“We've increased the staffing in our emergency service section, which is our SWAT team,” said Suffolk Police Chief Stuart Cameron.

Both departments are also reaching out to the community to further improve relations.

“We will continue having those conversations, and we'll continue leveraging those relationships, so that we both know what's going on on the ground and that the relationships continue to improve,” said Suffolk Police Commissioner Timothy Sini.

Top brass in both counties were emotional after the shooting deaths of the five police officers in Dallas. Black bands covered badges today, and there was a wreath-laying ceremony in Yaphank this afternoon. 

"While they were doing their jobs, barbarians just outright attacked them," said Krumpter. 

"It was a very brutal and disturbing attack, and it is something that's very much on everyone's mind working in police departments today," said Cameron.

The NYPD says it is closely monitoring Dallas, and says two of its counterterrorism units are prepared to respond.