Singapore's aviation authority has taken the strong move of suspending "all variants of the Boeing 737 MAX aircraft into and out of Singapore."

The suspension will start at 2 p.m., the Civil Aviation Authority of Singapore announced on Tuesday morning. The move will affect SilkAir, a regional carrier in the city-state, and the following airlines that fly into Singapore and have the 737 MAX in their fleets: China Southern Airlines, Garuda Indonesia, Shandong Airlines and Thai Lion Air.

Singapore Airlines does not have any 737 MAX 8 planes.

The decision comes as Aerolíneas Argentinas announced it was grounding its five Boeing 737 MAX 8 planes. Argentina's national carrier said the decision had been "taken after the technical reports” following the Ethiopian Airlines crash.

The following is a current list of airlines and jurisdictions that have suspended use of the 737 MAX 8:

A running list of airlines and countries that have suspended the use of 787 MAX 8s can be found here.