Two teenage couples were killed by unidentified gunmen in a plaza in eastern Sao Paulo early Saturday, Brazilian media reported.

Gunmen in a car opened fire as the four sat talking in the plaza at around 1 a.m. local time Saturday, the Web site of the Folha de S. Paulo newspaper said.

Three of the teens were killed immediately, and the fourth died while hospitalized, the newspaper said.

Sao Paulo police said they had a power outage Saturday and were unable to confirm the report.