Budget airlines risk stoppage over safety

South Korea on Thursday clamped down on lax safety protocols at low-cost airlines, warning them to mend their ways or face possible closure.

The transport ministry conducted a safety review of the country's six budget carriers this month, after one aircraft was forced to make an emergency return due to an unsealed door.

The Boeing 737-800 belonged to Jin Air, a budget airline operated by South Korea's top carrier Korean Air.