OAK CLIFF (CBSDFW.COM) – A warning letter was sent to parents of Sunset High School students in Oak Cliff on Wednesday after a group of men tried to lure two female students walking to the main school building from a satellite classroom.

“At the end of the day, what we feel is concern, and we’re going to do everything we can to reinforce safety in all of our locations,” said Dallas ISD Chief of School Leadership Stephanie Elizalde.

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The students were headed to lunch when the group of “unknown individuals” approached them. Someone in the group fired a gunshot into the air and drove away as the students continued walking to campus.

Neither student was injured.

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(Credit: Dallas ISD)

The incident happened as Dallas police continue investigating a nearby string of robberies against middle school students from last week.

Sunset High School principal Claudia Vega said the school is “revisiting transitions between periods and lunch for students who have classes across the street.

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Meantime, Dallas police have increased patrols in the area and students have stopped taking classes at the satellite portables across the street.