The library is a stone throw away from Conference Hotel, the hotel where a gas explosion killed four persons two days ago.
The explosion at OOPL occurred around 11:am at the Marcque event centre within the Presidential Library.
Daily Trust gathered that technicians were topping up gas into the Air Condition (AC) when it exploded.
“Two people have already been confirmed dead, ” a worker at OOPL told our correspondent.
The two gates leading into OOPL were shut when our correspondent visited.
Security guards at the gate turned visitors back, as only the truck of the State Fire Service and some officials were allowed into the premises.