DALLAS (CBSDFW.COM) – Dallas police responding to an early morning shooting call in the Lake Highlands area arrived to find two children injured by gunfire.

The shooting happened just after 2:00 a.m. at the Colinas Royale Apartments in the 9400 block of Royal Lane.

READ MORE: Is DFW The New Mecca For High School Hoops?

Police say an unknown person/persons fired “several rounds from automatic weapons” into an apartment at the complex, hitting a 13-year-old boy and 10-year-old girl.

READ MORE: Man And Woman Shot Outside Arlington Barber Shop

When police arrived there was an uninjured adult man in the apartment with the children. The 13-year-old boy was the most seriously hurt, with a gunshot wound to the  back of the head. The 10-year-old girl was grazed by a bullet on her back.

Both children were taken to Children’s Medical Center Dallas. Their exact conditions aren’t known, but the children’s mother spoke with a CBS 11 News crew and said her daughter is doing okay, but her son isn’t.

MORE NEWS: Postal Service Says Its Ready To Deliver This Holiday Season With New, Faster Sorting Machines

The Dallas Police Department Gang Unit is handling the investigation but say they have made no arrests and have no suspect information at this time.