ISTANBUL, Turkey -- An explosion at Istanbul's Sabiha Gokcen airport has killed one cleaner on a plane and wounded another, the BBC reports. The cause of the blast was not clear, and authorities were investigating whether it was the result of a bomb.
The airport is the second largest in the city.
Pegasus airline said the blast occurred at 2:05 a.m. local time on Wednesday (7.05 p.m. EST Tuesday), when no passengers were in the area, and that operations were continuing normally.
Turkey's state-run Anadolu Agency said police armed with rifles and protective vests imposed tight security at entrances to the airport after the blast, searching vehicles in the area.
The agency said one cleaner had suffered a wound to the head, while the other suffered a wounded hand.