Japan Airlines Co. and ANA Holdings Inc. said they canceled all passenger flights to and from Europe on Thursday, citing safety concerns following Russia's invasion of Ukraine.

The airlines, which normally use Russian airspace for their Europe flights, join a growing number of carriers that have cancelled or rerouted flights between Europe and north Asia in the wake of the crisis.

"We are continuously monitoring the situation, but given the present situation in Ukraine and the different risks, we have decided to cancel flights," a JAL spokesperson said.