Two wounded in blast at Istanbul airport, cause unknown: airline

An explosion at Istanbul's Sabiha Gokcen airport wounded two cleaning staff on a plane, but the cause of the blast was not clear, Pegasus airline said. Pegasus said the blast occurred at 2:05 am when no passengers were in the area and that operations were continuing normally. Police armed with rifles and protective vests imposed tight security at entrances to the airport after the blast, searching vehicles in the area while a police helicopter circled overhead, state-run Anadolu Agency said.