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SAN DIEGO — Victims of an explosion at a Tijuana apartment building came across the border to San Diego for treatment at a local hospital Friday.

The Christmas Day explosion was reported around 11 a.m. at a building on Calle Alba Roja, not far from Estadio Caliente, where Club Tijuana — the soccer team known as the Xolos — plays. Authorities were still investigating the blast Friday evening, but their initial impression was that it was some kind of gas explosion.

At least 50 people were evacuated from the surrounding area, but there were no concrete details provided on the total number of people injured.

UC San Diego Medical Center in Hillcrest confirmed three victims of the explosion were taken to San Diego for medical care.

A woman outside the hospital told FOX 5 she had family members, including a two-year-old boy, a 13-year-old girl and a 30-year-old woman, getting treatment in the burn unit after getting hurt in the explosion.

Two of the victims were in intensive care units, according to family, who were forced to wait outside the hospital due to COVID-19 restrictions. Friday evening, they told FOX 5 the 30-year-old woman and her 2-year-old son were still in critical condition, but all three patients are expected to survive.

They declined an on-camera interview, only asking for San Diegans to keep the victims in their thoughts and prayers.