President Barack Obama will reprise his role of "consoler-in-chief" on Friday evening when he is expected to meet with families of those murdered in the San Bernardino, California, shootings.
Fourteen people died on Dec. 2 when shooters Syed Rizwan Farook and his wife Tashfeen Malik opened fire on Farook's co-workers at a holiday party.
Obama's visit will be "patterned after" a similar trip to Roseburg, Oregon, in October when he met for about an hour with families of victims of a shooting at a community college there, White House spokesman Josh Earnest said on Wednesday.
The president has visited the sites of other mass shootings, including Charleston, South Carolina and Newtown, Connecticut, seeking to console rather than express anger toward the killers.
Unlike the other visits, Obama will land in San Bernardino as local and federal authorities are still investigating the shooters, later killed in a gun battle with police, and whether they were inspired by foreign militant extremists.
"We are always conscious of the impact that a presidential visit could have on law enforcement or emergency response resources," Earnest said on Thursday.
FBI Director James Comey has said Farook and Malik were radicalized some time ago. Authorities are also trying to determine whether the couple had help from others.
Federal authorities charged Enrique Marquez for providing material support to Farook and Malik on Friday. Marquez allegedly purchased two rifles used in the attack and had plotted to carry out attacks with Farook in 2011.
The Federal Bureau of Investigation also revealed investigators were looking into any connections there may have been between one of the two killers and four men arrested in 2012 in a separate terrorism case brought in nearby Riverside, California.
"I would not anticipate that a visit by the president just for a couple of hours to that community to console the families of the victims of that attack would have any impact on the pace or success of the ongoing investigation," Earnest said.
The attack has made Americans nervous, while Obama has tried to explain his strategy for combating Islamic State and preventing further attacks.
The president has used the attack to renew his call to tighter gun control, drawing criticism from some Republicans who say the administration should do more to fight terrorism than restrict guns.
Obama will stop in San Bernardino on his way to Hawaii, where he will spend the holidays with his family.