Los Angeles,Dec 16: Los Angeles schools have been abruptly closed as an unspecified threat is investigated, police have said.
Officials would not specify the nature of the threat, which led to students being sent home and school buses returned to depots.
A school district spokesman said the threat involved backpacks and packages left at campuses.
The district is the second largest in the US, with 640,000 students attending more than 900 schools.
“Earlier this morning we did receive an electronic threat that mentions the safety of our schools,” said Steven Zipperman, chief of the Los Angeles school police department.
“We have chosen to close our schools today until we can be absolutely sure that our campuses are safe.”
A schools spokesman said they were exercising “an abundance of caution”.
The threat comes amid a heightened alert after 14 people were killed by a radicalised Muslim couple in San Bernardino, 60 miles east of Los Angeles.
