Separately, NTV Japan reports that Japan Air Lines has cancelled all scheduled flights to and from Europe on Thursday.

Reaction of the market

Despite the recent rally in Asian indices, the market mood is still sluggish. There's also anxiety about the Russia-Ukraine conflict. After Wednesday's news of a possible ceasefire, the focus is still on the second round peace talks between warring countries.

S&P 500 futures fluctuate between gains and losses, but remain slightly flat throughout the day.