Las Vegas gunman scouted hotels near Fenway Park in Boston

After learning that Fenway was possibly in the sights of the Las Vegas gunman, who researched the park and nearby hotels, police are going to have a bigger presence this weekend, with metal detectors and bag checks. The official, who was not authorized to speak publicly, said it was unclear whether Paddock was ever in the city or when he conducted the Internet searches.

Now, officials are looking into reports that Paddock also researched locations in Boston including Fenway Park and the Boston Center for Performing Arts.

"We have a lot of work to do", FBI Deputy Director Andrew McCabe told reporters on Wednesday.

Massachusetts Gov. Charlie Baker also says he's aware of the reports but could not discuss them because of the ongoing investigation into the mass shooting. While there is now no credible threat to Fenway Park according to public safety agencies, the Red Sox have been working with city, state, and federal officials on increased security measures for postseason games at Fenway Park.

Officials have said there is no credible threat to Boston.

"The Las Vegas Metropolitan Police Department along with the Federal Bureau of Investigation has been investigating the attack in Las Vegas and we are following the evidence in search of the facts".

As the investigation continues, law enforcement authorities are assessing evidence to determine a motive.

"It's sad that we have to do these but given the tactics we're seeing, whether it's ISIS using large trucks, we continually have to adjust and make sure people are safe in the city", Evans said.

"The Boston Regional Intelligence Center is in contact with our local and federal law enforcement partners here and in Las Vegas and continues to monitor the situation", the department said in a statement.

It is not known exactly when he performed these searches, or if he visited Boston.