An email threat sent to several Los Angeles Unified School board members that prompted a closure of all
Los Angeles Unified Schools mentioned explosive devices, assault rifles and pistols and was traced to an
IP address in Frankfurt, Germany, according to law enforcement sources.

All campuses were closed Tuesday morning after receiving what officials have called a "credible threat" of
violence involving backpacks and packages left at campuses. Still, one law enforcement source familiar with
the evidence said there was no sign that "this individual is actually capable of carrying out the threat."

Law enforcement sources also said that the person who made the threats could have masked their location
and that the origin is believed to be much closer than Germany. District officials have been looking into the
threat since at least 10 p.m. Monday, according to a school police source. The FBI and LAPD are assisting
the investigation. 

Authorities said they plan to search all of LAUSD's more than 900 schools, including charter schools and special
education centers. The nation's second-largest school district, LAUSD has more than 700,000 students.