Certain Toyota factories in Japan will suspend operations once again after Automotive News reported that an explosion in a parts supplier facility affected the supply chain of the company.

The explosion supposedly happened at a parts factory operated by Aisin Advics, a company group partner that specializes in brake components. Four people have been sent to the hospital as a result of the explosion. Aisin, along with the local fire department, are still looking as to what caused the incident.

So far, the company has announced it has already cancelled a shift on some production lines at its Takaoka plant since May 31. The facility produces such models like the Prius C, RAV4 and the Auris. Today, the company has also stopped production at its Motomachi and Kyushu plants. The former produces the Mirai Crown, Estima and several Lexus models like the ES, GS, NX and RX. The latter, on the other hand specializes in manufacturing Lexus models only.

The company is hoping to restart production in two days time.

This is the third time the company had to suspend factory operations in Japan following the recent April earthquake and explosion at an Aichi Steel Corporation facility which also caused a parts supply shortage.