Singapore’s Civil Aviation Authority (CAAS) has temporarily suspended all versions of the Boeing 737 Max from flying into and out of the country.
The decision comes after an Ethiopian Airlines Boeing 737 Max 8 crashed on Sunday. All 157 people on board died.
It was the second fatal accident involving that model in less than five months.
Changi airport, in Singapore, is the sixth busiest globally, but it is unclear if flights will be cancelled.
Several airlines and regulators around the world have already grounded the Max 8 model following the crash.
Singapore is believed to be the first country to ban all variants of the Max family of aircraft.
CAAS has said the affected airlines are SilkAir, which operates six Boeing 737 Max 8 aircraft, China Southern Airlines, Garuda Indonesia, Shandong Airlines and Thai Lion Air.