Tammy Asselin and her 10-year-old daughter, Toni, were at the Lewiston, Maine, bowling alley when the gunfire erupted, and they got separated during the chaos.

Toni told ABC News Live the massacre was "like a horror movie."

"I saw someone get shot and I saw, like, blood splatter everywhere, and they just fell off their chair and they weren't moving," Toni said. "I ran out the exit. I didn't know where my mom was. And I ran with three other people to Subway."

"I was trying to stay a little bit calmer," Toni said. "But then when I realized my mom wasn’t following me, I kind of started crying."

Tammy Asselin's cousin, Tricia Asselin, was among the victims killed inside the bowling alley.

"She was the most fun person," she said. "I just feel devastated for the loss of her family, and especially her son."

As the search for Maine mass shooting suspect Robert Card intensifies, authorities said Friday that they've received over 530 tips and leads.

The shelter-in-place order remains in effect in the cities of Lewiston, Auburn, Bowdoin and Lisbon, and there will be an ongoing conversation each day, authorities said.

Divers will be a "major focus today," authorities said, adding, "We have a lot of other irons in the fire."

Meanwhile, police are continuing their work at the two mass shooting sites, the bowling alley and the bar, authorities said.

"We are going to be processing every square inch of these facilities," authorities said.

The suspected gunman -- identified as 40-year-old Robert Card -- has been a U.S. Army reservist since December 2002, the Army said. He has no combat deployments.

Card's sister told investigators she thought Card might have been looking for an ex-girlfriend at the shooting locations, law enforcement officials briefed on the investigation told ABC News.

The suspect appears to have "interacted with conspiratorial content" online, information provided to law enforcement shows. Topics he engaged with included but were not limited to: concerns about a financial crisis/stock market, LGBTQ+ issues, gun rights and commentary about Democratic public officials, including President Joe Biden.

A law enforcement source with direct knowledge tells ABC News that Robert Card had affiliations with the two locations he allegedly targeted.

An ex-girlfriend is connected to one of the locations. According to the source, "We don’t think this was completely random."

The suspect also appears to have been fairly thoughtful about eluding police. He left behind a cellphone that authorities have recovered apparently suspecting it could be tracked.

-ABC News' Pierre Thomas

At least 16 people are believed to be dead, though that number is in flux, and dozens more have been injured after a bowling alley came under fire in Lewiston, Maine, Wednesday evening -- the deadliest shooting of the year and one of the deadliest in recent decades.

Riley Dumont said she heard a loud bang after which her father, a retired cop, corralled them into a corner and put protection in front of them including "tables and a big bench that the kids were hiding behind."

“I was laying on top of my daughter. My mother was laying on top of me,” said Dumont. "It felt like it lasted a lifetime," she added. "I just remember people sobbing and crying."

Another witness at the bowling alley, whose name is Brandon, but whose last name was not made available, described hearing a "loud pop."

"Thought it was a balloon," Brandon said. "I had my back turned to the door. As soon as I turned and saw that it was not a balloon, he was holding a weapon. I just bucked it down the lane and I slid basically into where the pins are and climbed up to the machine and was on top of the machines for about 10 minutes until the cops got there."

Meghan Hutchinson, another shooting witness, said, "We were very scared and we didn't know, like, we didn't know what to do, what to expect from this. You know, nothing like this has ever happened here before. We barricaded in there and another parent was in the room with me. She had a phone and she called 911."

Zoe Levesque, 10, was grazed by a bullet.

“I never thought I'd grow up and get a bullet in my leg," said Levesque. "Like, why do people do this? I was more worried about, like, am I going to live and going to make it out of here? Like, what's going to happen? Are the cops going to come?"