A truck carrying bricks collided with the motorcyclists in Lenteng Agung, South Jakarta, on Tuesday morning as they were allegedly driving on the wrong side of the road.

The South Jakarta Police said they had interrogated the truck driver and had not, so far, found any evidence of wrongdoing on his part.

"We're investigating whether there was intent from the truck driver to cause the collision, but based on our investigation so far, the cause of the incident was motorcyclists riding in the wrong lane," traffic director Comr. Bayu Marfiando said, as reported by Kompas.com.

According to Bayu, the truck driver said he was trying to avoid a motorcyclist who had suddenly begun to overtake him from the right before the accident occurred. Because of this, the truck driver did not see the seven motorcyclists riding on the wrong side of the road in front of him, leading to the crash, he said.

Bayu said at least five people were injured in the incident, three of whom had sustained severe injuries.

He said traffic police would ticket the seven motorcyclists for violating traffic laws. Authorities are also investigating the possibility of charging them with criminal offenses.