Published: May 17, 2010 6:44 PM EDT

TAMPA, Fla. (AP) - Tampa authorities have lifted a lockdown at a high school, which went into effect after a small device exploded
on campus.

The Tampa Police Department searched Chamberlain High School Monday to make sure there are no more devices. The unidentified
device exploded in a hallway, burning the clothing and causing minor injury to one student.

No other injuries have been reported.   No arrests have been made, but the investigation is continuing.