The suspect alleged to have unleashed the carnage at a Monterey Park dance hall, killing at least 10 people, may have been to the studio in the past, Mayor Henry Lo said.

"We do understand that he may have had history of visiting this dance hall," he told NBC's "TODAY" show.

The mayor suggested it was possible the motive behind the attack "had to do with some personal relationships," but said police were still investigating.

It also remained unclear how the suspect had obtained the illegal weapon used in the attack, he said.

The Monterey Park Police Department has been overwhelmed with questions following the mass shooting, officials told the local community Sunday.

"Our dispatch center has been inundated with questions," police said in a local alert, urging residents to allow them to focus on emergency calls.

A memorial for the victims was set up at the City Hall, police added.

California Gov. Gavin Newsom met with local leaders of Monterey Park on Sunday, as he called for "real gun reform" at the national level hours after the deadly mass shooting.

"Monterey Park should have had a night of joyful celebration of the Lunar New Year. Instead, they were the victims of a horrific and heartless act of gun violence," he wrote in a separate tweet.

The Star Ballroom Dance studio, where Saturday's deadly mass shooting unfolded, has shut its doors temporarily, the studio announced Monday.

"What should have been a festive night to welcome the first day of the Lunar New Year turned into a tragedy," it said in a Facebook post.

"Our heart goes out to all the victims, survivors, and their families. In this time of healing, we hope that all those who were affected have the space to grieve and process what transpired within the last 24 hours," the statement read.

The studio was shut "until further notice" and all classes had been canceled, it said.

Authorities are still investigating the motive in the deadly shooting, which took place in California’s San Gabriel Valley region — home to more than a half-million people of Asian heritage who were celebrating the Lunar New Year.

The suspect, identified as 72-year-old Huu Can Tran, was found dead of a self-inflicted gunshot wound in a van in Torrance after a traffic stop led to a standoff, Los Angeles County Sheriff Robert Luna said Sunday night at a news conference. 

Law enforcement officials recovered “several pieces of evidence” in the van linking the suspect to both the Monterey Park scene and a second scene in neighboring Alhambra, Luna said.