Several Asian airlines on Wednesday said they would be avoiding Iranian airspace.

Singapore Airlines said it was diverting all flight routes from Iranian airspace.

The announcement came after Iran launched more than a dozen ballistic missiles against multiple bases housing U.S. troops in Iraq.

“In view of the latest developments in the region, all SIA flights in and out of Europe are diverted from the Iranian airspace,” the airline said in a statement to CNBC. “We are monitoring the situation closely and will make the appropriate adjustments to our routes if necessary.”

Taiwan’s China Airlines also said it will not fly over Iran or Iraq due to regional tensions, Reuters reported.

The largest carrier in Taiwan, China Airlines said in a statement to Reuters that it will continue to monitor the situation and adjust routes accordingly.

Another Taiwanese airline, EVA Air, and Malaysia Airlines also said they’re avoiding flying over Iran airspace, Reuters reported.

Tehran’s attack follows the U.S. killing of Iran’s top general, Qasem Soleimani, last Friday. Tensions in the Middle East rose following his death, with Iran vowing revenge.

Meanwhile, the U.S. Federal Aviation Administration issued notices on Tuesday night outlining flight restrictions that prohibit U.S. civil aviation operators from operating in the airspace over Iraq, Iran, and the waters of the Persian Gulf and the Gulf of Oman.

“The FAA will continue closely monitoring events in the Middle East,” it said in a statement. “We continue coordinating with our national security partners and sharing information with U.S. air carriers and foreign civil aviation authorities.

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Outside of Asia, Transport Canada said Air Canada has also changed its routes.

“Air Canada, the only Canadian air carrier that operates in the region covered by the FAA NOTAM, has altered its routes to ensure the security of its flights into and over the Middle East,” the transport authority said.

Transport Canada is in close contact with the FAA, it added.