A US tourist visiting Puerto Rico for a Bad Bunny concert was shot to death in a notoriously dangerous San Juan neighborhood on Sunday, authorities said.

Kevin Mares, 25, was shot twice while hanging at a popular nightspot in La Perla, a shantytown on the outskirts of Old San Juan, officials said.

Mares, a New Yorker, is believed to have been an innocent bystander when two people nearby started arguing and one pulled out a gun.

He was shot in the abdomen and side, according to NBC 6 South Florida , and was rushed a hospital but died.

At least two others, both La Perla locals, were shot and remain in the hospital.

The victim was shot twice while hanging out at in Old San Juan in Puerto Rico. UCG/Universal Images Group via Getty Images

Bad Bunny performs onstage during Night One of

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