The EU aviation safety agency said on Tuesday it was closing European airspace to Boeing 737 MAX aircraft after two fatal crashes of the model within five months.
"EASA has decided to suspend all flight operations of the two affected models," the agency said.
It noted that the "exact causes" of a crash of a 737 MAX aircraft operated by Indonesian airline Lion Air in October for the loss of 189 lives were still being investigated.
"Since that action, another fatal accident occurred," EASA said, referring to Sunday's Ethiopian Airlines crash that killed 157 people.
"At this early stage of the investigation, it cannot be excluded that similar causes may have contributed to both events," the agency said.
"Based on all available information, EASA considers that further actions may be necessary to ensure the continued airworthiness of the two affected models."
Earlier, India on Tuesday grounded Boeing 737 Max 8 aircraft in light of the Ethopian Airlines crash, in which 157 people were killed.
"DGCA has taken the decision to ground the Boeing 737-MAX planes immediately. These planes will be grounded till appropriate modifications and safety measures are undertaken to ensure their safe operations," the Ministry of Civil Aviation said in a tweet.
"As always, passenger safety remains our top priority. We continue to consult closely with regulators around the world, airlines, and aircraft manufacturers to ensure passenger safety," it added.
On Sunday, a 737 MAX 8 aircraft operated by Ethiopian Airlines crashed near Addis Ababa killing 157 people, including four Indians.