Update 7:19 p.m.
President Barack Obama is scheduled to travel to Newtown to meet the families of victims killed in Friday's shooting at Sandy Hook Elementary School, and to thank first responders, according to a press release issued by the White House.
"The President will also speak at an interfaith vigil for families of the victims as well as families from Sandy Hook Elementary School scheduled for 7 p.m.," the press release said. "More details will be released as they are available."
According to the Hartford Courant, Obama will not make any public appearances during his visit.
Danbury Mayor Mark Boughton Tweeted the helicopters people heard over Danbury today were an advance team setting up for a possible presidential visit early next week.
"We don't know when at this point," Boughton said.
The helicopters visited Danbury Municipal Airport and other locations in the city. The mayor didn't know if the helicopters visited Newtown yet.
"Those helicopters you hear are the Presidential advance team. No details on what day the President is coming," was one of the mayor's Tweets.
Airport Administrator Paul Estefan declined to say anything at all about the helicopters or the president or any visit. Estefan said when President Clinton visited Danbury, the advance team arrived three months before the visit.
"They are scouting landing locations. He's not with them," Boughton Tweeted, referring to the president.
The Sandy Hook Elementary School shooting began at about 9:30 a.m. Friday. In all, 27 people were killed, police said, including 20 children. Among the adults killed were the school’s beloved principal and psychologist.
The identities of all victims have been established, according to State Police Spokesman Lt. J. Paul Vance. Families of those killed have asked that no media members press for interviews.