Washington (AP) -- The government is warning police that suspected members of extremist groups have signed up to be school bus drivers.
But FBI and Homeland Security officials say they have received no threats or credible information to suggest a plot.
The warning comes in a routine bulletin the FBI and Homeland Security sends to local law enforcement agencies. It notes "recent suspicious activity" by foreigners who either drive school buses or are licensed to drive them.
But, the bulletin also says the agencies "have no information" indicating the people in question are involved in a terrorist plot. One government official says the document is meant to keep local officials alert, adding "it's prudent to check the background of all those who come in contact with school children."
An FBI spokesman says "parents and children have nothing to fear."
Copyright 2007 by the Associated Press. All rights reserved.