Details remain vague in a violent double shooting at a Texas park that left one lesbian teen dead and another hospitalized in serious condition.

As The Corpus Christi Caller originally reported, Mollie Judith Olgin, 19, and Mary Christine Chapa, 18, were found in knee-deep grass in Violet Andrews Park in Portland, Texas on Saturday.

Olgin was pronounced dead at the scene, while Chapa was rushed to a nearby hospital where she had surgery. She remained in the hospital on Monday, Portland Police Chief Randy Wright confirmed to MSNBC.

Wright could not confirm the nature of the girls' relationship, but friends say they had been a couple for about five months. When MSNBC asked if authorities believed the girls' sexuality had provided any motive for the shootings, Wright noted: "That’s always something that we’re looking for, but as of this point, we have not been able to establish that that had anything to do with the attack."

Investigators told KRIS-TV.com they believe Olgin and Chapa were shot with a large-caliber gun some time around midnight on Friday after being led down a trail and into a grassy area. They were found about 9 hours later. Wright noted that the case already had "some of the earmarks of a targeted attack," but said no arrests have yet been made, nor had any suspects been identified.

A Facebook group has planned a candlelight vigil at Violet Andrews Park in honor of Olgin and Chapa for Friday, June 29. More details about the vigil can be found here.

A second vigil will be held in Washington D.C.'s DuPont Circle on June 29 at 6 p.m.