DALLAS - The lockdown issued for 12 Lake Highland area schools was lifted and students released as Dallas police continue to investigate a sexual assault that took place at a nearby home.

The schools were placed on lockdown due to "increased police activity" in the area, said Tim Clark, a spokesman with the Richardson Independent School District.

While Clark did not reveal further information on the lockdowns, which went into effect at about 10:15 a.m., the Dallas Police Department confirmed they were working a nearby case in which a woman in her mid-30s claimed a man broke into her home at about 7 a.m. Tuesday and sexually assaulted her in the 8700 block of Aldwick Dr.

The victim told police a man entered her residence and attempted to suffocate her with a pillow. Police said she was able to escape and ran to a neighboring home for help. She was transported to Parkland Memorial Hospital.

The victim described the suspect as a Latin male, standing about 5'6" and with a pencil mustache. Police said he was wearing a gray hoodie and that the victim may have scratched him during the attack.

Aldwick Drive is located about a block away from Ferndale Road, where police are investigating two other recent rape cases. Dallas Police Chief David Brown will address the media about the assaults during a 3 p.m. press conference, the department said.

The first rape was reported on February 22. In that case, the victim told police a man broke into her home and assaulted her at knifepoint. Exactly one week later on March 1, Fernando Munoz, 33, was arrested. Police call Munoz a strong strong suspect in the case and are testing his DNA, which they said could connect him to at least four assaults in East Dallas.

On March 15, a second rape was reported on Ferndale Road. According to the police report, a man broke into the victim's residence at about 10 p.m. and committed the assault. The victim described the perpetrator as a clean shaven Latin male in his 20s, standing about 5'8" with a round face and short buzz cut.

However, police said the suspect descriptions in the two rapes, which took place on the same street in a three-week period, were different.

Munoz is being held without bail on multiple charges of burglary and sexual assault.

The district said the caution lockdowns will likely not impact release times at the school.

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