Alvin Crawley, the interim superintendent of Prince George’s County schools, sent an e-mail Wednesday to the parents of public school students after what Laurel city police called a “credible threat” by a student to “possibly shoot and kill others” this week.

Laurel City police spokesman Pete Piringer said Tuesday that investigators found “notes and lists and diagrams and things like that” in the student’s locker that “gave credibility to” the threats, though he declined to say what those threats were specifically or what the materials detailed.

“The police chief believes that a pretty potentially dangerous situation was prevented,” Piringer said.

Crawley thanked the community for its patience while the investigation of the potential threat was undertaken.

“The safety of students and staff is our utmost concern, and we are extremely thankful that Laurel High School students shared their concerns with the proper authorities so that we could work quickly with the Laurel City Police to investigate this matter,” Crawley wrote. “Although the school never faced a direct threat, we must take all such reports seriously to ensure the well-being of our students and staff.”

Crawley said some parents expressed concern about how the information about the situation was relayed to the public.

Briant Coleman, a spokesman for the school system, said the school principal called parents Tuesday night, sent an e-mail to Laurel parents Wednesday morning and sent a letter home with students.

Crawley said the school system will release “all information as soon as it is made available by law enforcement officers.”

He said parents should sign up for the school system’s e-Alerts, which provides emergency notifications. Registration is available on the county school system's Web site.