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A man and a woman who were found shot to death behind a market in Pomona Tuesday night were likely ambushed but investigators don’t know why, police said Wednesday.

Valerie Enriquez is seen in an image provided by a family member.

Police responded to a “shots fired” call outside of Perez Market on the corner of Ridgeway Street and Barjud Avenue just before 11 p.m. Tuesday, according to a news release from the Pomona Police Department.

Arriving officers found a 37-year-old Hugo Reynoso and 27-year-old Valerie Enriquez on the ground suffering from gunshot wounds. The victims’ identities were confirmed by police.

A vigil is expected at 7 p.m. Wednesday.

The victims did not have gang ties, police Sgt. Brian Hagerty said. Both had been shot multiple times and were pronounced dead at the scene.

“They were probably just hanging out on that retaining wall,” said Hagerty, who indicated the shooter or shooters likely ran up to the unsuspecting victims and then opened fire.

“You could say they were probably most likely ambushed … they probably didn’t see it coming,” Hagerty said.

Multiple reports to police indicated that more than one person got out of a vehicle and ran up to the couple, Hagerty told the Inland Valley Daily Bulletin.

Investigators were interviewing witnesses and looking at surveillance video, Hagerty said.

Enriquez leaves behind a 10-year-old son, according to the victim’s mother, Shari Piedra, who talked to KTLA.

“She’s a beautiful girl. That’s my daughter, she’s a beautiful girl,” Piedra said.

The victims were good friends and not romantically involved, a friend of Reynoso told the Daily Bulletin. Reynoso had a daughter, the friend said.

Hugo Reynoso is shown in a photo posted to Facebook by his mother.

Reynoso’s niece Rachel Ceja said her uncle wasn’t involved in drugs or gangs, and agonized over why anyone would want to take his life.

“He was probably the sweetest person you could ever meet,” she told KTLA. “He’s the happiest person, and if anyone were ever to meet him he would likely just be with you.”

Hagerty said the pair might have been drinking behind the store — something that happens often, according to a neighbor who spoke to the newspaper.

No motive for the shooting has been determined and authorities did not have a description of the shooter or shooters.

Candles were left as a memorial at the shooting scene on Wednesday afternoon, and about 100 people returned to the spot for a vigil that night.

“I’ll miss everything,” Piedra said through tears at the event. “She’s in my heart right now. She’s in our hearts.”

Lorraine Flores, a friend of Enriquez, said reality had not yet set in.

“I’m not there yet,” she said. “It’s too close to home right now.”

Witnesses and anyone with information are asked to call the Police Department at 909-620-2085. Those who wish to remain anonymous can call “Crime Stoppers” at 800-222-8477.

KTLA’s Melissa Pamer contributed to this article.