The FBI is investigating the contents of four suspicious envelopes found Monday at the University of Hawaii law library.

“Everyone’s more cautious because of APEC,” said FBI Special Agent Tom Simon, referring to the Asia-Pacific Economic Cooperation meetings that open today. “We’re not taking any chances.”

The FBI notified the police and fire department. 

Fire personnel found no obvious explosives, hazardous chemicals or toxic hazards, said fire Capt. Terry Seelig.

An FBI agent and a capitol police officer will be present when the envelopes — a standard letter-size and three large envelopes lined in bubble wrap — are opened today, Simon said.