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UPDATE: There will be a vigil at Violet Andrews Park in Portland, TX on Friday, June 29, 2012 at 6PM CDT. Learn more on FB page.

Two teenage girls in a relationship were found with gunshot wounds to the head in a south Texas park, with one of them dying from her injuries, media reports say. Police were searching for their assailants.

Mollie Judith Olgin, 19, and Mary Christine Chapa, 18, were found in knee-deep grass in a nature area in Portland by a couple Saturday, said Portland Police Chief Randy Wright, who confirmed to msnbc.com details first reported by the Corpus Christi Caller Times. Olgin, originally from Ingleside but recently living in Corpus Christi, died; Chapa, of Sinton, was rushed to a hospital where she had surgery and was in serious but stable condition on Sunday, local NBC affiliate kristv.com reported. Wright said Chapa was still in the hospital on Monday.