Japanese companies with operations in Tianjin were scrambling Thursday to gauge the extent of damage to their businesses following massive blasts at an industrial area in the Chinese port city. At least 44 people were reported dead and 520 injured, with potentially huge property damage.

The Japanese Embassy in Beijing said it had no confirmation of Japanese nationals among the casualties, as of Thursday morning.

Toyota Motor Corp. said its group firm Tianjin FAW Toyota Motor Co. runs a unit assembling cars for the Chinese market about 3 km from the facility where chemicals were thought to have ignited and exploded.