A ready-mix truck crashed into a vehicle from behind in northeastern Seoul, causing a 13-car pileup and leaving four people injured, officials said Friday.

The accident happened near Seokgye Station at 9:21 a.m. and caused heavy traffic congestion as officials closed off the area to take care of the aftermath.

Police are looking into the cause of the crash and the exact scale of damage.

Source: Yonhap News Agency