Four people were killed and 37 were injured on Jan. 5 when a KA Turangga intercity train running from Surabaya to Bandung collided head-on with a Greater Bandung commuter train serving the Padalarang-Cicalengka route.

The crash took place along a stretch of rice fields between the Cicalengka and Haurpugur stations in West Java. Both trains’ power cars were destroyed, and numerous train cars were overturned. The Turangga train was carrying 287 passengers at the time of the incident, while 191 people were aboard the commuter train.

After a month-long investigation, the KNKT announced on Friday that a fault in the signaling system and safety complacency among train dispatchers were the main causes of the fatal crash.

In response to the findings, KAI would evaluate its operational procedures, company spokesperson Joni Martinus told The Jakarta Post on Monday, especially those related to train signaling.

"KAI remains committed to delivering excellent services and consistently prioritizing safety in its operations. We will also continue to educate our employees on safety culture so that it can be ingrained in their DNA," Joni added.

Read also: KAI improves safety after train crash as probe continues