The emotional wounds from Pulse were fresh as Orlando woke up to news of a sniper-style ambush that killed five police officers in Texas, putting the Central Florida law enforcement community on the defensive for potential danger.



At least three law enforcement agencies in Central Florida received threats against their departments. Orange County Sheriff Jerry Demings said their office and the Winter Park Police Department received bomb threats.



A person called into the agencies and threatened a bomb would explode at a specific time. Demings said the threats were found to have been unsubstantiated and officials are investigating.



Orlando Police are also investigating a "vague threat" made Friday morning against its department, said Chief John Mina, who would not elaborate.



Reports from Dallas stirred more feelings in a city that has barely begun to heal after the deadliest mass shooting in U.S. history left 49 dead at a gay nightclub. Across downtown Orlando Friday, people spoke about race, guns and the importance of unity following another national tragedy.



"The only thing that can kill the human race is the human race," said Robbie Clark, a 27-year-old financial adviser from Winter Haven who was standing outside of Pulse, where a memorial to the victims remains. "We're in an election year ... and it's important who we put in office, but people are losing their lives: Black lives, Spanish lives, lives of those who choose to love other people."



Clark, who is white, said he has fears about the world his 4-year-old daughter will inherit if people remain divided.



In the "coordinated" attack in Dallas, a sniper opened fire from elevated rooftops during a protest over fatal police shootings of black men in Louisiana and Minnesota, according to The Dallas Morning News. Other attacks on law enforcement officers were reported in three states after the news in Dallas.



At a press conference Friday alongside black members of clergy and police chiefs from agencies across Central Florida, Demings said the region is united and will not allow the violence that has occurred in communities across the nation.



"[We want] to make sure none of that comes to this community," he said. "I am confident the people who live here who believe and trust in this community will come together and won't allow that lawlessness that is happening in other places to happen here."



For residents, some complained of gun laws being a factor that's led to the uptick in violence.



"Something needs to be done related to the guns--it's getting worse," said Chester Davis, a 59-year-old black man from Cocoa Beach visiting the Pulse memorial Friday. He said he doesn't think everyone should be stripped of their weapons, but advocated for steeper penalties for those convicted of crimes with firearms.



For Ricardo Catabay, a dark-skinned Filipino man who served in the U.S. Navy until 2013, issues of guns and race cannot be separated. The 28-year-old Winter Springs man said he carries a gun with a concealed weapons permit and fears that one day he'll be pulled over by a police officer and get shot because of the weapon and his skin color.



It's not fair that police officers who shoot black men "get placed on administrative leave and nothing will happen to them," he said Friday while getting a haircut at Urban Stylez in downtown Orlando.



Even before the shootings in Dallas, Mina sent out a message to his officers, urging them to be careful in an atmosphere of anti-police sentiments stoked by the deaths of Alton Sterling in Baton Rouge and Philando Castile in suburban St. Paul, both of which were captured on video.



OPD SWAT snipers were deployed on the roofs of buildings near Lake Eola on the Fourth of July "to observe the crowd from an elevated position," said Sgt. David Baker. He would not elaborate or say if the measure was taken before the Pulse attack.



echerney@orlandosentinel.com; dharris@orlandosentinel.com; rstutzman@orlandosentinel.com; chayes@orlandosentinel.com

